Place your stained garment on a flat surface. Slip a piece of clean cloth, such as a discarded handkerchief, an unmatched sock, or a sewing scrap, under the stained area.
Apply glycerin to the stain with a cotton swab. (You can substitute hairspray for glycerin.) Rub the glycerin into the fabric gently, covering the stained area. Mix a few drops of gentle laundry detergent with a small amount of water in a bowl. Daub the solution onto the stain with a fresh cotton swab. Continue to swab on the solution until a small lather builds.
Set your washing machine on a cold cycle. Add an enzyme-based laundry soap and launder the treated garment. Check the garment after the wash cycle to make sure the stain has been successfully removed. Repeat the process if the stain is still evident.