The people we bought our 1992 Jayco from told us to keep a utility light on inside it over the winter. They said the light would keep the camper just warm enough to prevent mildew. I spent 2 days cleaning the mildewed canvas, caused from when, they said, the bulb burned out a few winters back. Has anyone heard of doing this, or have any better ideas? It will be stored outside in rainy, damp Washington and I definitely don't want that mold growing back. Thank you!