his subject has been discussed over and over again in both, the iRV2 and the Motorhome-Forum. It seems that neither moth balls nor dryer sheets do any good at all. In fact there were some reports stating that the mice used the dryer sheets as nesting material, and the nests were right next to some mothballs. I live in the woods, and have the motorhome parked on a clearing, one should think that I would have a large mouse problem, but I had never ever had a mouse inside the rig. I went around and under it with steel wool and silicone and stuffed and sealed every possible hole that I could find. I also bought a Black & Decker rodent repeller gizmo that makes a terrible screeching pulsing noise. The mice seem not to like it, my dog does not like it, and I don't like it either. It is this thing, it looks like B&D sold the business. Mine looks identical, just in the B&D colors
http://www.amazon.com/Bird-X-Transon...+pest+repeller