Mold can form on dirt and other foreign matter if it is not removed from the material.
To remove mold or powdery mildew:
1. prepare a solution of 1 cup bleach and one quarter cup of mild soap per gallon of water.
on the entire surface and leave to act in the fabric for 15 minutes.
3. clean the entire surface with a sponge, clean towel or soft brush.
4. thoroughly to remove all soap residues.
5. dry in the air.
6. in case of strong mold formation, the amounts of bleaching agents can be increased.
7. best clean the entire surface of the fabric to avoid water rings and stains.