Mildew may grow on dirt and other foreign substances if not removed from the fabric. To Remove Mold or Mildew: 1.Prepare a solution of 1 cup of bleach and one-fourth cup mild soap per gallon of water. 2.Spray on the entire area and allow to soak into the fabric for 15 minutes. 3.Clean the entire surface area with a sponge, clean towel or very soft bristle brush. 4.Rinse thoroughly to remove all soap residue. 5.Air dry. 6.For severe mold/mildew growth, bleach quantities may be increased. 7.It is best to clean the entire surface area of the fabric to avoid water rings and stains.