The mice hide and only come out when it's cool and dark or maybe it's just when I'm not in the car. For some reason, once they find their way in, they don't seem to be able find their way out. So, I've had to resort to mouse traps in my car. You should see the look on the faces of the people who bring my groceries to the car when they see the mouse traps!
So, I've got to load up the mouse traps again. For the first time this summer. I thought I had seen the last of the little buggers.