I used Corte Clean and it really worked as stated. We had a party and everyone was saying how clean the deck was. I even mentioned to my neighbor who has a composite deck that he should buy your product. He tried power washing his deck and said it left white spots. I sure wish you sold this stuff at the major stores like Menard’s, Lowe’s etc. I think it would sell like crazy as nothing else I know of cleans this well and is easy to use. I am glad I found this product.