Find the cause of the mold. The source of the mold needs to be fixed before you start cleaning. Look for leaks around appliances, in air conditioner duct work, around sinks and tubs or anywhere where moisture can get in.
Seal off the room with plastic and tape before cleaning and only clean one room at a time. Mold spores are toxic and can be transmitted through the air to other parts of the house. Make sure to wear a mask, gloves and protective eye-wear. Wash clothes and shoes immediately after finishing. Throw all rags into a garbage bag and take straight outside.
Place a dehumidifier or a fan in the room to dry. Removing moisture from the area will prevent spores from spreading and causing further damage. If the room has windows or a door leading outside, open it to air out.
Mist the areas of mold with water. This will prevent spores from going airborne into other parts of the room and re-attaching. Mold can be dormant for months before showing any signs of growth.
Mix soap and water and apply to areas of black mold with a rag or pump sprayer. Use a rag, old toothbrush or a scrub brush and thoroughly clean the area. Make sure to clean all areas around the mold in case it has spread.
Disinfect the area with bleach, ammonia, alcohol or hydrogen peroxide, following the same steps as you did with the soap and water. The product you choose depends on the degree of mold in your room and overall health of the people in the home. For example, bleach works wonderfully on mold and kills almost anything, but the fumes can make some people sick.