Forget about all of the homemade concoctions using washing soda, bleach, etc. Pick up some Concrobium Mold Control, which is formulated to treat mold and mildew on just about any surface. The manufacturer claims that, unlike homemade solutions, Concrobium kills the mold completely and leaves behind an antimicrobial barrier to prevent new growth.
Apply Concrobium with a brush, cloth, roller or sprayer, even a pump sprayer. Let it dry, then scrub away any remaining stains and reapply the product to form a protective barrier. You can treat large infested areas, such as crawl spaces, by using the product with a fogger from a rental store.
Unlike bleach and other treatments, Concrobium is odorless. You can find it in 1-qt. spray bottles, 1-gallon jugs or 5-gallon pails at most home centers or online.