While it’s always safest to hand-wash, most silk sheets can go in your washing machine in lukewarm or cold water on the most gentle cycle with a pH-neutral liquid detergent. A mesh laundry bag also helps.
Fabric softener is OK, too, but avoid tumble drying, especially for an extended period of time. Instead, line dry your sheets out of direct sunlight to maintain their strength.
For best results, be sure to read the company's instructions for care.