I caught some movement one time out of the corner of my eye when I got in my car, drove to work. That night put a "sticky trap" in the car, next morning "Willard" was looking alittle stiff.
Sticky traps are the bomb, worked in my Landcruiser too.
Always vaccum your cars and never leave food. Kids are slobs in the car, they leave crumbs and morsels for the little devils to feed on.