For cotton and polyester: Apply glycerin to stain and let sit 10 minutes, then treat with gentle liquid laundry detergent, such as Ivory Snow, and water. Rub until suds form, then rinse. Machine wash in warm water.
For washable silk and wool: Same as cotton and polyester, but do not rinse—dab water until suds are gone. Take to a dry cleaner if stain remains.