I did last year. My cover had a lot of mildew,dirt,pollen and pine sap on it. Called my normal cleaners and the gave me the number to one with a machine big enough to handle it. Cover cleaned up good but not perfect. We retreated it with scotch guard and its repelled water nicely for over a year. 60.00 for the dry cleaner and around 20.00 for the scotch guard.