You’ll need to check your care label for instructions on how to care for your specific set of sheets, but it’s possible to wash silk sheets in a machine or tub. Wash silk sheets either by hand or on the gentlest cycle. Always use cold water.
Also, ensure you’re washing your sheets separately from other fabrics. Mesh laundry bags created for silk are also not a bad idea. Finally, never put silk in the dryer. Always air-dry.