We have a 1997 Alpenlite 29ft single slide. We noticed over the winter that we had a mildew smell coming from the storage compartment. I took out everything underneath and sprayed a section of wood ...
when repairing my water damage i used a combo of white vinegar, water and pet odor enzyme solution..i put it in a garden pump sprayer and sprayed everything. i have zero off smell and with the new subfloor, insulation etc it smells like a new camper.