While outdoor cushions are designed to withstand the elements, they can also get dirty and develop surface mildew. Before you reach for bleach to clean them (which can discolor the fabric), try something cleaner and more effective instead: a power washer. The pressure of a power washer is enough to blast the grime, dirt and mildew off the cushions. When clean, lean the cushions against a sunny wall so they can dry out thoroughly.
ANDREWS MCMEEL SYNDICATION