What can I do to eliminate odor in the basement? Ready for this? I have: 1/3 concrete floor 1/3 dirt floor 1/3 crawl space with dirt The dirt floor is very dry. The crawl space is possibly damp but not excessively. It also has a water well (I'm guessing) at one end. The addition floor almost sits on it. It's about 8' diameter with brick around it like a hand dug well. Very hard to get to as the crawl space is very tight. The smell is usually in the winter and only occasional .. but bad. Doesn't sound like sewer. Not necessarily musty either ... can't place it. Will hydrated lime help? Any odor reducing agents? Can't afford a major construction.