For cotton and polyester: Scrape off any dried food with a dull knife. Rinse garment in cold water to dilute the stain. Mix a solution of ½ cup liquid laundry detergent per one gallon of water in a plastic bucket. Soak garment for 30 minutes. Machine wash in warmest water safe for fabric. Repeat if necessary.
For washable silk and wool: Scrape off any dried food with a dull knife. Apply a small amount of gentle liquid laundry detergent, such as Ivory Snow, to stain and let sit five minutes. Apply a small amount of water and rub gently to form suds. Flush with cool water. If stain persists, take the garment to a professional.