To refresh linen, cotton or synthetic fabric that’s been preshrunk and colorfast, you can machine-wash slipcovers. Launder separate from other articles on gentle in color water with an all-purpose detergent. Air dry or tumble on low, then reposition on the furniture while slightly damp to minimize wrinkles and help with fit if there’s any shrinkage. Drycleaning is almost always a preferred way to clean slipcovers and cushion covers – we can spot stubborn stains and make sure there’s no shrinkage.
From:: Slipcover strategies.