Corte Clean saved me. Mold was taking over our Trex deck that was only a year old. We tried pressure washing with various concentratipns of bleach. Trex does not seem to be aware of this product! I called their customer service department and was told to try a bleach deck cleaner-this only made the mold/fungus angry and it took me hours to apply it. I googled “Trex cleaner” and found one small report about Corte Clean (surrounded by irrate Trex customers responses). I was thrilled with how fast Corte Clean worked.