What about the silk cushion cover if it is slippery?
Soak the warm soapy water and white silk textile general on the temperature of 25 DEG C for about 15 minutes, then gently scrub. Rinse it several times with water until it is clean and dry. Kagila's home slip silk cushion cover color up to 24 kinds, very selective. Pretty good!
In general, if it is not deliberately contrived, it is not easy to slip silk. Silk, if greasy, is often used to remove fat stains by wiping it off with gasoline.