Sponge the area with clean water. Rub glycerin into the stain. Let it sit for an hour. Rinse the area with warm water, then sponge the affected area with diluted ammonia.
Apply diluted vinegar to older stains and use a sponge to dab the mixture onto the section of silk. Crush aspirin and mix with water and cream of tartar. Place it on the stain and let it sit for 25 minutes. Thoroughly rinse the section with clean water, then spot dry.
Scrape away any residue like hardened food if you find pieces on the silk. Carefully clean the affected spot with soapy water. Mix ammonia and alcohol together in equal parts. Dampen the area with the solution. Let it sit for 25 minutes, then clean with water and pat dry.