Blot spill with paper towels, sprinkle on talcum powder, salt, or cornstarch to cover stain. Treat with liquid laundry detergent, Wash in the hottest water safe for the fabric. Using a clean sponge or white cotton cloth, dab at stain, working from outside in. Blot with warm water. Dab with dry-cleaning solvent.
Sunlight can sometimes help by killing the fungus.
If the garment is bleach-safe, soak for up to 15 minutes in a mild solution of 1 ounce chlorine bleach to 1 gallon cool water. Launder as usual. Blot up liquid with paper towels. Blot with water, pat dry.