Before washing silk, be sure to check the label for manufacturer's recommendations. Many silks are machine washable in cold water. Be sure to check for colorfastness before washing, to prevent fading. If it is not colorfast, you will need to have it dry cleaned. If the label says to hand wash, use a protein hair shampoo and don't twist or pull. Handle the silk gently and hang it to dry. To spot treat stains, use color-safe bleach or a mix of one part hydrogen peroxide and eight parts water.