Mildew has a musty odor. It often occurs in homes during damp and humid weather. Towels, walls and tiles in bathrooms and basements are common locations where mildew appears.
To rid the home of the mildew odor, the home's occupant must first eradicate the source of the mildew. Sometimes he may find the source, but if not, he must treat the entire room. Cleaning walls and floors with a mixture of 1 part bleach to 4 parts water kills mildew. If the source is fabric, the home's occupant can place it in the washer and soak it in all-fabric bleach for 30 minutes before doing a normal wash. The key to keeping mildew at bay is to keep all areas of the home dry.