Mold on hard surfaces is best cleaned using soap and water, commercial cleaners, or a solution of 1 cup bleach per gallon of water, states the Centers for Disease Control and Prevention. If mold is growing on absorbent surfaces, such as carpeting or drywall, it's best to discard the material.
When using bleach to clean mold, opening doors and windows is advised to provide adequate ventilation, notes the CDC. Bleach should never be mixed with ammonia or other cleaners, and wearing gloves and protective eyewear is also recommended. After cleaning, it's important to thoroughly dry the area and ensure that the source of moisture is addressed so the mold problem doesn't recur.