I tasted Honda’s spicy rodent-repelling tape and I will do it again (2021)
465 comments
·February 11, 2025tofof
nkrisc
Interestingly, that very irritant is now the key to the widespread success of some pepper species by the way of a specific species of mammals.
tofof
Oh? Which pepper species and carrier mammal are involved here?
Edit: DERP duh you mean humans. :D Literally made the comparison without recognizing it, too. /Edit
Not challenging you, just curious and not immediately finding the answer myself with a quick search.
The capsaicin receptor is TRPV1, which is a critical protein for thermoregulation and detection of being burned. In other words, it's not just a quick and easy evolutionary path to have a mutation break the receptor for capsaicin and now be immune to the taste. Obviously the animals could evolve behavior or even simply learn as juveniles to tolerate or even enjoy the taste (as many humans do).
There are some other interesting things that happen with avian carriers, like reductions in fungal infection and attractiveness to other predators (ants). https://www.washington.edu/news/2013/06/21/airborne-gut-acti...
jumhyn
I believe it’s a cheeky reference to humans intentionally cultivating hot peppers specifically because of their capsaicin-producing quality. :)
14
I mentioned in another comment about growing a Carolina Reaper last summer and trying it with my dad and 13 year old son. My dad and I instantly knew how bad the next half hour or so of our life was about to be. My son also found it hot but no more then 5 minutes later comes out of his room (after we all chewed a pepper and spat it out he went to his room with a slurpee) he casually walks out and says dad is it okay for me to have a shower. He didn't have his slurpee and really did not seemed bothered by the experience at all. Me on the other hand was in insanity pain. Could not stop running water over my tongue or suck on ice and suffered for at least a half hour. I just couldn't believe he took it so well. My only thought was he must not be so sensitive or lacks something like the receptors that detect it.
After writing all that I did a search about people with low TRPV1 receptors and found an interesting study done on a couple people lacking functional TRPV1 channels. They were insensitive to the application of capsaicin to the mouth and skin. Furthermore they had an elevated heat pain threshold as well as an elevated cold pain threshold. Why I found this interesting is because my same son who barely reacted to this insanely hot pepper I can never get to wear a jacket to school. He does not mind the cold at all. He will if we were up a mountain or something but he always complains the car is too hot when I am cold. Anyways not sure he lacks function TRPV1 receptors but still interesting to think about. Article linked below.
null
RobotToaster
Reminds me of the theory that wheat domesticated humans.
fsckboy
driving down the road I was inspired to taste some fresh wheat grains in a field: tasted a lot like flour. what is that "thing"? an attractive tasty flour nodule? the energy yolk to the seed's egg?
looofooo0
Well wheat co-evolved such that seeds stayed attached after being ripe. Without humans resowing them, it would have been impossible.
cjbgkagh
One of many in a long list of evolved pesticides
BurningFrog
Others are nicotine, caffeine and cocaine.
What else?
EDIT: and morphine!
thayne
Being delicious to humans is a pretty good evolutionary advantage. Although, not necessarily good for the longevity of individuals of that species, see, for example, cattle.
bobthepanda
It is also somewhat anti microbial, so it became useful for food preservation. See: kimchi
cnity
Though you're right, in kimchi the primary preservative is initially the saltiness and then later the low pH caused by lactobacilli producing lactic acids.
jorvi
Apparently (some) peppers are anti-inflammatory, which I guess I have to accept the science of, but still disagree with on an empirical level.
cyberax
You can make fermented cabbage without any hot peppers. It's common in Slavic cultures.
ssl-3
[citation needed]
(My peppers ferment just find using microbes.)
jasonpeacock
Yep, you can get spicy bird food which completely eliminates squirrel, rat, rabbit, racoon, and other issues with your bird feeders:
https://order.wbu.com/shop/bird-food/hot-pepper
It's a game changer, it's the only bird food that I use now.
natebc
Your squirrels are wimps. I use WBU's no-mess spicy version ... Squirrels have little problem with it. Every now and then one will bounce around a bit after eating it but they still come every day.
GZGavinZhao
Squirrels in Sichuan: yesssir more spicy bird food plz!!! XD
foobiekr
I find that it is an effective rat repellent - a neighbor has a rat colony they will not address - but while it was effective for squirrels at first, they seem to have gotten over it, and we now see them eating dropped seeds without any pause at all. I think the first generation never overcame it but now they do eat whatever the birds spill.
FuriouslyAdrift
Mint... it will grow like crazy and reodentia hate it. Catnip is even better because it attracts cats.
https://www.evergreenseeds.com/do-mint-plants-keep-mice-away...
mauvehaus
A mouse died in my plow truck this summer and the smell was unreal. Like, thank god I got the power windows working bad.
I was told that Irish Spring soap is minty enough to repel mice. Based on the scratch/tooth marks in the bar I left in the glovebox, it apparently isn't.
Next summer, I'll try something with peppermint oil. Assuming I can get the transmission fixed for a reasonable price. Not having reverse is proving to be a hassle.
dunham
In my previous house, I had mice get into a bag of gochugaru, so I guess some mice can tolerate it. For squirrels, I've only sprinkled it on the ground to keep them from digging up my garlic cloves.
doubletwoyou
for those unaware like I might’ve been, gochugaru is Korean red pepper powder
kylehotchkiss
[flagged]
pfooti
Poisoned rats are eaten by owls and raptors, who then die or move out of the neighborhood.
foobiekr
Now you're killing other animals with the collateral damage.
If you must use traps, use snap traps and take the responsibility for cleanup.
1024core
Why poison an animal just trying to survive?
timewizard
> Mammals, on the other hand, have teeth
Chewing is also an imperfect process. Mammals, and I can tell you this personally and with some disdain, sometimes pass seeds as well.
> found a chemical irritant that repels the mammals
Deer, and I can tell you this personally and with some disdain, seem to love peppers as much as we do. They're also harder to keep out of your yard.
astrange
> Chewing is also an imperfect process. Mammals, and I can tell you this personally and with some disdain, sometimes pass seeds as well.
That's how you get poop coffee.
adamrezich
Not a good deer repellant, though—at least for the mule deer around here. My mom once sprayed some plants she had to prevent the local pests from eating them, but instead, they just ate the plants anyway, and then proceeded to shit all over the yard everywhere.
intrasight
>shit all over the yard everywhere
They do that in any case
adamrezich
It was particularly messy in this case.
jongjong
It's wild to think that plants are engaged in this constant struggle to produce seeds that have an outer shell that is just strong enough not to be consistently dissolved in a bird's stomach but not so strong that they won't ever dissolve.
One one hand, some seeds must survive passing through the bird's digestive system intact to later grow into a plant, on the other hand, some seeds must be digested in order to keep the birds interested in consuming that seed... Alternatively, a bird species interested in eating indigestible seeds may become extinct due to malnutrition.
14
I can not remember the tree or plant and the following is only my best recollection and may be slightly incorrect, couldn't reach my dad to ask, he told me about a plant and I forget if it had basically been eradicated possibly to human harvesting and was unique to a region if I remember correctly and it was believed to be gone. But then some seeds were found and they tried to germinate them but continually failed. As I remember what he told me was that someone going through some ancient writings or paintings and it showed the tree and birds eating from it. He then said the person had the idea to feed the seed to a bird and see if it did anything. Apparently it was successful and he was able to grow this lost plant/tree what ever it was. The whole story sounds far fetched but my dad is not a bullshitter he would have seen it on some history channel or similar. Looking up birds eating seeds and germination explains that the digestive enzymes in a birds stomach can help break down the hard outer coating on some seeds helping germination. I will ask him when I can and report back if I can verify anything he said.
As for spicy peppers funny to me story. I grew a Carolina Reaper plant last summer and the plant did well and I got something like 200 peppers from it. Of course I had to know what it felt like so me my dad and my 13 year old son tried them. We all threw a big chunk in our mouths chewed for about 5 seconds and spat it out.
The pain was basically instant. It was at about 2 seconds I knew this was not going to be good. It was insanely hot which lasted about half an hour, the entire time me running my mouth under the tap or putting ice on it, trying crackers and milk, even tried to wash my tongue. Some how my son after about 5 minutes very calmly says can I go have a shower. He was hardly bothered by the pepper.
Funny thing happened couple weeks later. I was telling my friend how insane these peppers were. He then asks if he can have some as he has a bear knocking over his garbage every night and wants to leave some for the bear to eat and hopefully encourage it to stop. So he makes a burrito and fills it with 5 or 6 nice sized reapers and leaves it out before bed. Well middle of the night his phone dings and his outside camera detected motion. Fires up the video and what does he see, not the bear but some stray dog walking the neighborhood run up and down the thing in a couple bites. Oh man I hope that dog didn't suffer too bad when it came out the other end.
buildsjets
It might be on the list of plants at https://en.wikipedia.org/wiki/Lazarus_taxon ?
Of that list, we have a Metasequoia / Dawn Redwood tree in our yard, it's great fast-growing shade tree with deciduous leaves that are so small you don't need to rake them. Thought to be extinct, re-discovered in China in 1944, availability in nurseries is pretty good.
gkoberger
If the above comment was interesting to you... you might really like the YouTube video "The truth about Hot Ones sauces"! It goes into this theory, along with how spice levels are measured.
giarc
That's one of the best blog posts I've read in a while. It nails the idea of "write one line that makes the reader want to read the next". It's humorous but also serious. There's no fluff. Instant subscribe.
tfehring
It's like the opposite of clickbait. The author did, upon information and belief, taste Honda's spicy rodent-repelling tape, and made a strong case that she will in fact do it again unless someone stops her. Truly giving the people what they want.
lqet
"Honda never replied to my tweet."
I lost it when I read that, what a great post.
ceroxylon
I disagree, it is unnecessarily verbose and seems to revolve around engagement.
zeekaran
Unnecessarily verbose? So you hate reading, I guess.
tourist2d
[dead]
sizzle
The cynic in me questions how much writing is enhanced with AI these days rather than being the authentic style of an author. Great read nonetheless…
bigiain
If yiu have any real examples of llm written text that's as fun to read as that, I'd be curious to see them. Most llm text I see is vapid and uninspired. Kinda exactly the mediocre writing you'd expect from a machine designed to create statistically average sentences based on all the writing its creators could steal.
LLMs write bland LinkedIn "thinkpieces", not Douglas Adams style creative wordplay.
yojo
It’s from 2021, so you’re probably safe on this one, but I feel your angst.
sadeshmukh
I don't believe anybody should care. If AI made it better, why should I care that they used AI? Either way, I doubt this was AI-assisted - I absolutely love this style.
amelius
LLMs have no sense of humor.
taurknaut
Damn I could have gotten the "no fluff" version by looking at wikipedia or just googling.
Why do people expect their non-fiction reading to be entertaining? That's not the point and I inherently don't trust your judgement if that's what you're looking for. At some point you've got to provide insight.
sangnoir
Wikipedia won't inform me about the social media and email dynamics at a car manufacturer. Just the email response alone was entertaining and informative: self-aware humor-encrusted legalese that is very human. I can appreciate it for what it is: great PR work from a professional. Wikipedia is pretty humorless, it probably wouldn't even acknowledge the subtext.
taurknaut
I can't say I care without any recourse to remediation.
scubbo
"Informative" and "entertaining" are both valid goals for non-fiction writing (and, indeed, fiction writing, if you squint enough to recognize that it can convey "information about how people think/feel/act"). Arguably, the ideal would be to achieve both; but, achieving either is perfectly fine.
Most non-fiction aims to inform, and most fiction aims to entertain, but either can do either.
schneems
There’s a reason that storytelling is so powerful: The best information delivery is one you’ll remember. The two have a synergistic effect.
tiagod
There isn't that much to know about this tape. It's just a spicy tape, and it's probably not very toxic. "The point" here is the story - the tweets and emails, the thought process.
I really liked it, and clearly a lot of people here liked it too! You're free to dislike it, but that doesn't make it pointless. There's more to humanity than pure, unadulterated facts (however important and interesting they really are!)
ddejohn
I, for one, appreciate having a little whimsy in my life, as a treat.
cka
It's entertaining when reading is entertaining. This was a great "read while eating lunch at work" read because it was entertaining.
I didn't really care too much about rodent-repelling tape before reading and don't care much now. It was the entertaining writing that brought value for me.
NoboruWataya
> At some point you've got to provide insight.
Why though? Seinfeld had nine seasons of no insight and it did okay.
taurknaut
I can't say I've ever watched much seinfeld, but Curb Your Enthusiasm regularly has stimulating social insights.
papertokyo
But would you have thought to research how a specific car manufacturer's spicy anti-rodent tape tasted in the first place?
There's an element of discovery in this article, as well as being entertaining and informative. Her writing is—subjectively and objectively—uncommonly good.
taurknaut
I just don't care. I hate my car. I resent relying on it. Whether it works or not is something for my employer to care about.
bean-weevil
I can't believe you just called a blogpost about eating rodent repellent "nonfiction reading"!
lmm
It's very much nonfiction. She really did lick the tape!
taurknaut
...why not? Is this inaccurate?
devilbunny
I read entertaining nonfiction all the time. Not everything has to be an algebra textbook. Try Ben Macintyre if you like spy/war stories.
wlesieutre
For reference on the poem at the bottom https://www.poetryfoundation.org/poems/56159/this-is-just-to...
Another adaptation I enjoyed https://x.com/AthertonKD/status/585661777645547520
exhilaration
Thank you for both links. I only read the linked article after following your links!
TRiG_Ireland
Thanks. I knew it was a reference. It was tugging on threads in the back of my brain. But I couldn't place it at all.
tamasnet
Thank you!
rukuu001
My version:
This is just to say
- quit fucking with that poem
numlocked
I have no insight but boy oh boy is this funny and well written. Like prime Dave Barry [0].
ping00
I genuinely can’t remember having laughed at well written prose in a long time, thanks for sharing [0]. OP is gold too.
Takes me back to my high school days when I would have to choke down my laughter as I surreptitiously read Cracked.com articles in class
wibbily
Reminded me of Dennis Lee too
uean
My God I havent struggled to contain laughter in a public place like this before. Thanks.
twic
Reminded me a lot of Steve, Don't Eat It! (modulo twenty years of progress in being less deliberately over the top online):
https://web.archive.org/web/20180712104826/http://www.thesne...
buildsjets
Well that kicks me right in the memberberries. The Beggin, Lettuce, and Tomato sandwich was a classic. https://web.archive.org/web/20180712104821/http://www.thesne...
p1nkpineapple
In the same vein, this had me rolling https://cernius.substack.com/p/finger-lickin-good
xp84
Dave Barry was my favorite columnist as far back as age 8 or 9. He's so funny.
halkony
I have not laughed this hard in ages. I am in love with this author.
donaldihunter
A genuine lol, for both the OP and for [0]
leonixyz
The most hilarious thing to me in this story is the PR guy who replied "most of the things sold in the US these days require warnings about causing cancer". And everybody seems fine with that. LOL
xsmasher
It's ridiculous, but maybe not the way you think; Prop 65 in California classified a lot of things as requiring notification, including things like "Wood Dust." so now every apartment building has a sign in the hallway that says "this building may contain chemicals" and everyone ignores it. The law has lead to people being less informed rather than more informed.
classichasclass
I despise Prop 65 warnings in principle, but the damnable thing about them is they may actually have some effectiveness, if this study is to be believed ( https://pmc.ncbi.nlm.nih.gov/articles/PMC11651356/ ): "Levels of certain chemicals listed under California’s law have declined in biosamples from people across the nation. ... Although the law did not require changes to product formulations or processes, interviews with representatives of affected companies have indicated that many businesses did alter formulations to avoid having to post warnings or manufacture special products just for California."
The study has a lot of limitations, and NHANES is not really designed for this kind of analysis, but it sounds like the warnings do well as a cudgel to beat manufacturers with even if regular individuals ignore them. Even more interesting is the knock-on effects Prop 65 has on people outside of California. Overall it seems like an argument to keep them around, sort of.
sib
I've recommended that we just put up signs on the Interstate highways entering CA...
abtinf
Also coffee.
krick
I remember when I first bought a knife either made in USA or just targeted at that market (not sure: I mean, I don't think it was the first thing I bought made by an USA company, but I've never seen that warning before), and found that warning inside the package I was quite puzzled, like WTF, I though I was buying a good knife, not some recycled hazardous waste-material or whatever this is. Then, of course, I googled and found out that they stick it on pretty much anything, so that plastic handle is probably just like any plastic handle of any knife I held before. But still it was very weird.
bigtimesink
They're as silly as they sound. Growing up, there was a sign when you enter the school's bus storage and maintenance area. More recently, I've seen them at Starbucks (for coffee), in the vinegar section of the grocery store, and on untreated lumber.
This isn't California being California, but it is well-meaning legislation getting out-of-hand because of enforcement mechanisms. It's like website cookie warnings. It was a nice idea, but it lead to a silly place.
jrmg
Replying because I remembered coffee too, and had to look it up. ‘Good’(?) news is that it was decided in 2019(!) that coffee does not require a Prop 65 warning.
https://www.p65warnings.ca.gov/fact-sheets/coffee-and-propos...
kayge
Whenever I see these warnings in the wild, I (jokingly... mostly) think to myself: "well I don't have to worry about getting cancer from this because I live in Texas now, not California"
zeekaran
Prop 65 is frequently joked about but at the time it was a resounding success. The drawback is that any item being sold in California that doesn't pay for the extensive testing (to confirm it doesn't contain any of the thousand chemicals on the list from 1985), ends up carrying the label that the item might cause cancer. If Wikipedia is too dry for you, there's a podcast that explains the history and facts well https://99percentinvisible.org/episode/warning-this-podcast-...
_moof
I once walked into a hospital that had a prop 65 warning on the door.
larrik
I caught that too, though I believe the California warnings are generally of the form "if you can't prove nothing in there causes cancer, then it might cause cancer."
ben1040
Raise your hand if you tasted a Nintendo Switch cartridge because you read the plastic was infused with a bitterant to mitigate choking hazards.
bigstrat2003
Back in the day when I worked desktop support, we would use a lot of canned air. And when they added bitterant to that stuff in order to keep kids from huffing it, it became almost unusable for its intended purpose because it turns out that nobody wants to have to breathe the bitter air after they clean out a PC. So, I went to the office supply store and sampled some different brands to see which ones didn't add a bitterant. The irony that their anti-huffing measure led to me (essentially) huffing canned air at the store was not lost on me.
myself248
We just bought an air compressor.
And ran the hose outside, because nobody wants to breathe the dust, either.
philjohn
And if you don't want to buy an air compressor, an electric computer duster saves you money in the medium and long term. I haven't bought a can of compressed air in years.
ThatPlayer
I learned the hard way that if you're using canned air upside down as a method to cool something down rapidly, the bitterant stays behind.
Cpoll
I found this out accidentally. I have a habit of holding the cartridge between my lips when I switch cartridges (my hands are occupied with the case). Then minutes later I'd notice a bitter taste when drinking water or licking my lips, and have no idea why!
bentcorner
Telling people not to do something is a sure fire way to get them to do it. Human curiosity is strong.
rob74
Case in point: in Germany, there are occasionally "Durchgang verboten" ("passage forbidden") signs next to driveways leading to e.g. an inner courtyard. These are most of the time a sure sign that it's possible to take a shortcut through the courtyard to the other side of the block. Of course, this is a country where you can be reasonably sure of not getting shot for trespassing...
devilbunny
In the US, “NO THRU TRUCKS” is a dead giveaway that you are staring at a shortcut route. And as it isn’t “PRIVATE ROAD”, you are not trespassing.
If it’s not someone’s home, and you are not engaged in nefarious activity, you will not be shot for trespassing. You will be told to leave.
happyopossum
> where you can be reasonably sure of not getting shot for trespassing
How exactly does that make it OK to be disrespectful of other people's property and privacy?
somenameforme
Well.... how did it taste?
Waterluvian
It tasted like that time I popped a Smartie/Rocket in my mouth and began chewing casually only to realize that it was an uncoated Tylenol pill.
waltbosz
I thought it tasted like quinine/tonic water or maybe grapefruit rind (the ingredient in the Beverly soda from Italy). Coin batteries sometimes have a bitter taste coating which is similar to the Switch cart.
ben1040
I stuck just the tip of my tongue on there, and it was so bitter that it was more of a sensation than just a taste. Enough that I reflexively pulled away.
veonik
Well, I can say that you definitely won't want to taste it twice.
mikestew
I was disappointed that it was a bit bitter, yes, but not in the category of “won’t do it twice”. Such that I even tried multiple cartridges. I’m retirement age, though, so maybe my taste buds are shot.
ThrowawayTestr
Extremely bitter
fastball
Which in that case is Denatonium Benzoate.
razakel
The brand name is Bitrex. They send samples to parent groups to demonstrate why it's a good idea to put it on things kids might swallow.
lmm
Kindle charging cables were a favorite among some of my friends, for similar reasons.
ollybee
<raises hand> .. It really was grim
aschla
When I lived in Chicago with a car, and parked it in the small lot behind a condo building, I had to battle with the rats chewing through my car's wires. Twice they chewed through the MAP sensor wires which caused all kinds of misfires. Had to rewire that whole section of the harness. Then wrapped every wire I could see with this rat tape, and it worked for a while, until maybe the hot/cold cycle of the engine bay degraded the tape enough to not be effective.
They loved the warmth of the engine in winter. They'd climb up into the engine bay and hang out throughout it, bringing along nesting material, aka trash.
To try get rid of them, I tried the typical bait boxes, specialized rat traps, regular rat traps, peppermint, moth balls, a motion sensor light underneath the car, and more. The only thing that really worked was sending so many rat reports to the city that they had to keep coming out to bait the burrows in the neighbors small yard, until they likely talked to the owner directly to do something about it. I had talked with the guy briefly once and asked him about the rats (that were obviously only coming from his small backyard), and his response was pretty much "well it's the city so yeah they're around." Pretty sure one of his tenants also abruptly moved out because the rats chewed through their car too.
The lack of awareness from the guy contributed to me moving out of the city for good. Couldn't stand playing the lottery of good neighbors when most were either renters or inept owners, or a combination of both.
apeace
> The only thing that really worked was sending so many rat reports to the city that they had to keep coming out to bait the burrows in the neighbors small yard, until they likely talked to the owner directly to do something about it.
I was recently deputized into the "Rat Pack" of New York City[1].
The main thing I learned is that exactly what you said is true. When there are rat problems, you have to go to the source. Traps/poison in a localized area is not going to work, as the brown rat is easily able to reproduce faster than we can kill them with those methods.
In fact, certain methods have ended up helping the rats. At one point the city put out thousands of boxes with poison in them. The problem is the boxes were designed to be nice and cozy for the rats, so they'd be tempted to go in and eat the poison. Instead, they go in there and mate. (They also use the boxes to evade predators).
NYC's current strategy is to improve data collection on rats, and then use that data to better enforce standards (like garbage disposal), eradicate burrows, and plant different shrubs that aren't as friendly to rats. You have to fully eliminate the environments that sustain them, you can't exterminate your way out.
Always report rat sightings in your area!
[1] https://www.nycservice.org/opportunity/a0TQq00000DwaIoMAJ/ny...
ropable
This. This is what I come to Hacker News for. Absurdly well-documented writeups of things about which I am intellectually curious but that no normal person in their right mind would experiment with.
tomcam
Easily one of the most informative rodent tape reviews I’ve read this week
hollywood_court
Land Rover/Jaguar could benefit from this tape.
Rodents love chewing on the electrical harnesses in these vehicles.
When I ran an import repair shop, my clients owned over 100 Jaguar sedans, and every single one of them was towed in at some point due to rodent-damaged wiring. While the problem wasn’t as severe with Land Rovers, we still had more than 40 of them towed in each year for the same issue.
tim333
In one of my previous flats we had rats and mice which we ignored - my flatmate was jain so very live and let live - until one day I turned the cooker on and there was a huge bang - they'd gnawed off the insulation on the power cables.
I didn't know about chillies but it might have helped.
_moof
It's a big problem in old airplanes too. I've known a few pilots who found out their nav lights (on the wingtips) weren't working anymore because a mouse got inside the wing.
fatnoah
I had a Subaru that required over $1000 in labor replace a $13 master wiring harness that was chewed by a rodent.
Of course, nothing will beat having a rodent die somewhere in the engine, and not noticing it until exiting the car after a 45 minute highway ride and making my in-laws neighborhood smell like someone barbecued rotten meat.
mythrwy
We had trouble with deer mice eating car wiring.
I found this spray at the feed store that looked to be a sort of small outfit based on the label. It was hot pepper extract, diesel, glycerin, a few other ingredients. Worked really well. But then it disappeared so I made my own.
I bought a few bags of dried cayenne peppers, crushed them and soaked them in acetone (no I didn't care if the mice got cancer at that point). Then filtered and discarded the remaining pepper chunks and let the acetone evaporate in a pan outside. I then got a few glycerin suppositories from the pharmacy and mixed with kerosene, the pepper extract and a little peppermint oil and had my own spray. A few times a year I spray down the engine blocks and wiring harnesses and we haven't had an issue since.
beacon294
I think are joking, but have to mention that Acetone is not expected to cause cancer, at this time.
palmotea
> You see, the thing about rodents—be they rat or shrew or vole—is that they really like to gnaw.
IIRC, they don't like to, they have to. If they don't wear down their teeth, they'll grow out of control and kill them.
fkyoureadthedoc
Or, hear me out, their teeth have to grow because they like to chew so much they'd wear them down and starve
SV_BubbleTime
Really a mouth half full kinda of guy.
i80and
Unfun pet rat fact: if their teeth start growing at weird angles for whatever reason, this mechanism stops working and you have to get the teeth trimmed every couple weeks.
zimpenfish
> If they don't wear down their teeth, they'll grow out of control and kill them.
cf the Babirusa - "If a male babirusa does not grind his tusks (achievable through regular activity), they can eventually keep growing and, rarely, penetrate the individual's skull."[0]
Clamchop
To be fair, the biological mechanism for motivating behaviors is usually by making it rewarding.
They both have to and like to!
Liquid capsaicin treatments for bird seed are an effective squirrel repellent.
They also illustrate the evolution of this protein: birds have no receptors for capsaicin, while mammals do. Birds eat seeds mostly intactly. Their digestive systems are capable of breaking them down - but it's stochastic and some seeds make it through the bird undigested, being redistributed elsewhere. Obviously, having an agent sow your seeds widely is a fitness advantage, and so seedy plants are ultimately served well even if 90+% of their caloric investment into seeds goes into the birds.
Mammals, on the other hand, have teeth - particularly molars. Mammals that eat seeds grind them apart orally before even swallowing. As a result, any seeds ingested by mammals are very likely to be completely destroyed. Plants - peppers, anyway - found a chemical irritant that repels the mammals without even being sensed by birds.
I've used one such treatment (with an amusing logo illustrataion - https://i.imgur.com/JAl8vyW.png) to good effect to discourage squirrels at my feeder, so that they stick to my dedicated squirrel bungee with a log of compressed corn instead.