Removal of old stains may require washing in a fabric-safe bleach. Soak and agitate fresh stains in cold water before washing. If the stain is dried or old, scrape or brush off crusted matter and soak for up to several hours in cold water using a detergent or an enzyme presoak. If stain remains, soak an additional 30 minutes and rewash. If stain remains, relaunder with bleach that is safe for the fabric.
Place face down on paper towels.
Repeat treatment if needed, using an all-fabric bleach. If fabrics are colorfast, use liquid chlorine bleach for tough stains. Launder in the hottest water safe for the fabric. Do not use soap. Removal of old stains may require washing with a fabric-safe bleach.