It worked! I’m very pleased. At a neighborhood party this spring neighbors were asking how I liked our new deck and my response was that I hated it because it had spots all over it that I couldn’t get clean. Now I’m telling my neighbors that I’ve changed my mind because of Corte Clean. I’ll be ordering more this fall. I went through two containers as our deck is 1,500 sq. feet. In addition to the mildew spots, it even got out grease spots that I thought were permanent. Again, I am extremely happy that I found your product.