I will sometimes fine a rodent nest in my engine compartment. I've tried setting mouse traps with limited luck. I put a trap on top of each wheel and sometimes it works. But if I forget to take them off, well, I flatten a mouse trap.

I saw these electronic mouse repellents and was wondering if anyone has used them before. Since they stay on when the car is off, do they draw too much on the battery?

https://a.co/d/cWiwir8

Mothballs and electronic traps baited with peanut butter keep my garage clear of rodents.

Those ultrasonic repellents are hit or miss. Many don't work well. They draw very little power, so a healthy car battery won't mind for a few weeks. For a sure fix, try putting dryer sheets or peppermint oil-soaked cotton ***** under the hood; rodents hate the smell.

agree with above. if your traps are on the rubber, they are in the wrong place. All animals seeks the engine bay heat. I have a car that is driven twice a month. I bait snap traps with PB, place in front of each air intake, place rags on the air filter side of the air intake to prevent a nest being created on the filter, then I hook a "Remove Before Flight" tag to my steering wheel to remind me to remove everything before flight, er, drive. Hood is unlocked. I apply pure peppermint spray to back firewall and (semi-permanently) attach mothball sacks to rear axle and front control arms in a safe manner. I have caught numerous field mice (neighbors property is massive) with decreasing incidents over a year. Daily driver makes this cumbersome, but spending months hunting down a chewed electrical wire is worse. I have surrounded the vehicle with a number of animal 'safe' poison bait tube-type traps that only mice can enter, then exit. (Dog, cat safe) This is easier to do for a DD, but snap traps are a necessity IMO.

google how to prevent rodent damage to car.

hundreds of ideas will come up.

from my reading and experience keep your pest control random and change it up...
Rats hate change.

A friend of mine has a bunch (had a bunch) in her attic. The squirrels ate em.

They got into my SL and chewed the injector leads on 2 cylinders . I had let my traps lapse and literally just paid the price. Keep the traps full of fresh peanut butter and you will be fine. The ultrasonic gimmicks have never worked for me.

Trading mice for squirrels doesn't sound like a solution.

I heard of these before but it is not as effective as physical solutions, I would hire a cat : )

MouseBlocker | Top Rodent Repellent For Car Engines

Thanks for all the responses and suggestions. I will keep this updated with my findings. By the way, the device also uses flashing blue and white strobe lights intermittently.

Certain types of animals have a certain spectrum of colours they have the ability to see. For example, a dog's eye can only see certain colours of which humans can see but they can't.

We'll see what happens.