I've just been hit for the third time with mice.
The first infestation the nest was in the vicinity of the coolant return pipe in the front clam. I suspect it was the mice urine that degraded the pipe that caused the leak (required un-gluing the frame to repair). I tried moth balls the following winter which only made my car smell like my grand-pappy. Thankfully I've never had damage to the wiring. The last couple of winters I've kept the varmints at bay with dryer sheets at key access points and vents, soap shavings in trays in the cockpit, and mouse poison in the garage.
This time cost me my soft top. They chewed the exterior portion of the soft top and stripped the headliner. The nest was made just aft of the battery. This occurred in just a matter of 4 days. I've never had a problem during the summer.
We have a cat but its so pampered it'd probably just watch the mice move in. As a kid in Maine, we used to have a ferret that would actually go into walls of the house using the same tunnels made by the mice and slaughter the nests. One hell of racket but got the job done. The Man Cave is about to get a new mascot!!!