I heard to tie dryer sheets on your wiring, I did it to my new Pioneer 520 last year and they don't seem to bother it in the barn. I figured it couldn't hurt.
Shawn
Bounce dryer sheets do work for a while. We use them in the camper. She put some "natural" sheets in one year and the mice used them to make a nest.
Mothballs work. They keep wasps from building nests under the boat seats too.
