I discovered years ago that when the weather turns cold the field mice find a way under the hood of my cars as well has the interior and trunk to build their winter nest. Last winter I murdered a half dozen mice. Might get down to freezing next couple of days so I’m setting up my little “mine fields”.
I guess it’s all about your local climate. Atlanta has been pretty warm until now. The critters only show up when they’re looking for a warm place to crap and destroy upholstery. I used to use live traps but now it’s total war. Peanut butter and Victor Mouse Traps. I never figured out how they get from the ground to the inside of my cars. They must be able to jump a long way. Little bastards!!
Yes it’s been cold here for some time they are calling for snow in the next day or two. I’ve used traps but I only seem to get 3 or 4 of them before they wise up and stay clear of the traps. Now I’ve set my sites on killing ALL of the mice on the property!
Spread some MOTH BALLS under the hood in several spots ... Also INSIDE the car under seats, etc. etc. I did this for years and it seemed to work in all cases ! I hope you're successful in your hunt !!
I've not had a mice issue, so far. I've had them crawl in the fan section in the rear of my Lincoln welder. I went to use the machine and couldn't figure out why it was not working -- mouse nest in fan section. Made screen from chicken wire fitted over fan -- no more problems. Rather have em there than in my car. I'm in the garage a few times a week for various reasons -- may be the reason I have not had that problem.