I had mice get into my F-250 crew cab. I kept seeing bits of foam in the rear of the cab, I would vacuum up the foam only to have to do it again in a day or so.
I finally took a two pronged approach, with peppermint oil from the health food store and glue traps from Walmart. I soaked cotton balls with the peppermint oil and put the glue traps under the driver and passenger seat. Got the little devils with the glue traps in about a week. The truck smelled minty fresh until I was sideswiped on a mountain road and the truck was totaled. No such problems with the replacement truck.