1a. Visit the stain experts at your local Sparkle Cleaners!
1b.Use a prewash stain remover or rub with bar soap.
NOTE: If perspiration has changed the color of the fabric, apply ammonia to fresh stains or white vinegar to old stains; rinse.
2. Launder using hottest water safe for fabric.
NOTE: Stubborn stains may respond to washing in a product containing enzymes or oxygen bleach in hottest water safe for fabric.
Courtesy of RealSimple.com