Remove mold/mildew by scrubbing the area with a non-phosphate detergent solution and then clean with water. Dry the area. Surface mold growth stains may be removed using a solution of 3/4 cup household bleach to 1 gallon water. Rinse with clean water and allow to dry thoroughly before painting.

More extensive mold infestations may have grown into the gypsum board and cannot be removed by cleaning. Killing the mold with chlorine bleach or other biocide does not remove the potential health effects of exposure to mold. The mold must be removed. This may require replacing the material on which the mold was growing. Mold or mildew only grows in damp areas. The moisture problem must be corrected, or the mold growth will occur again. The recommended relative humidity level is 35% to 55%. Check the humidity level in your home using an electronic relative humidity gauge. Provide air circulation through the closet to assure that the temperature and relative humidity are the same as in the rest of the house. Leave the door open, or install vents in the door. Remove some of the items from the closet to encourage more air circulation between and behind items. Damp clothes placed in a closet will create a damp environment conducive to mold growth.