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 ...
I found a pin hole under the stairwell that soaked the bottom of the paneling entering into the storage area. I cleaned it all out and sprayed the whole area with bleach. So far so good. Thank you all for suggestions.