Getting the 5th wheel ready for our next long trip. It has been sitting for almost a year, and the wife says it smells "moldy" inside. I've shampooed carpets, wiped down all surfaces, cleaned the AC...
Have you checked all areas underneath - the space between the floor and underbelly (especially around the tanks), the basement around the water pump and plumbing, etc? If that's where the smell is originating, it could still be making its way up inside the unit.
Rob
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