Take the clothing that has become moldy outside, and shake it lightly to remove any surface mold. Avoid doing this indoors so that your living space is not infiltrated with the airborne mold spores.
Wash the item by hand, using lukewarm water and a laundry detergent. You may also choose to wash it in a washing machine, but do not add other clothing so that other clothes are not impacted by the mold. Follow the garment care instructions on the clothing label by using the correct water temperature and detergent for the specific garment.
Lay the garment outside in a sunny spot to dry, rather than drying in a dryer. The sun will lighten any mold stains and can entirely remove minor staining.
Apply lemon juice over the stain and cover with a layer of salt, if the sun alone did not remove the stain. Place the clothing back into the sun once you have treated it with lemon and salt so that it can dry, while the lemon, salt and sun remove the stain.
Mix together perborate bleach and water, using a tablespoon of bleach to a pint of lukewarm water, according to the University of Georgia. Check the garment label to determine whether you should use lukewarm water or if the garment can handle hot water. Use a sponge to dab the bleach solution onto the mold stain and then rinse out. If the garment is delicate, test on an inconspicuous area before treating the stain.
Soak the stain with a mixture of chlorine bleach and water as a last resort, if the stain persists. Mix together 1 or 2 tbsp. chlorine bleach in a quart of water and apply it to the stain with a sponge. Let the chlorine bleach work on the fabric for five to ten minutes before rinsing.
If your garment is very delicate or especially meaningful to you, take it to a dry cleaner and allow them to remove the mold and stain.
Some people are sensitive to mold, so you may wish to cover your eyes and hands with protective eye wear and gloves while removing mold.