Wipe all traces of the mold off the surface with a rag saturated with white vinegar.
Leave the vinegar on the surface for 10 to 15 minutes before rinsing the area with cold water.
Dry the surface with a towel.
Mix 1/2 gallon of warm water with 1/2 cup of oxygen bleach.
Scrub the mold off the surface with a rag saturated in oxygen bleach mixture.
Rinse the surface with cold water after 10 to 15 minutes and towel dry.
Pour 1/2 gallon of warm water in a bucket. Dissolve 1/2 cup of borax in the warm water.
Dip a sponge in the borax mixture. Hold the sponge over the bucket and wring it out to remove excess mixture.
Scrub the surface with the sponge until you have removed all traces of the mold. Rinse the borax residue off the surface with water and towel dry.