When RVs are stored for the winter it’s not uncommon for mice and squirrels to make their winter home in the RV. These animals are notorious for chewing through vehicle wiring, plastic and rubber lines, causing extensive damage to the RV.
Possibly, the most important step is to try and prevent mice and other rodents from being able to access your RV. This can be difficult because they can enter the RV through some very small areas.
Start by inspecting the underside of your RV for any gaps or holes. Fill these gaps using silicone or expanding foam. A word of caution, if you never used expanding foam before you should experiment with it on something other than your RV first. When it dries it can expand a great deal more than you expect. Next, open drawers and cabinet doors inside your RV. Look in all of the corners and crevices, especially where plumbing and wiring enter the RV. If you can see any daylight mice can get in. Fill these areas with silicone or foam.
I don't recommend any type of poison. It can take several days for the poison to work and the mice will usually die somewhere that you can't find them. If this happens you may never get rid of the smell. If you do use poison make sure pets can’t get to the areas where you put it.
Read Mark's In depth article on rodent control:
Copyright 2007 by Mark Polk, owner of RV Education 101