For years I tolerated my dirty Trex original deck. Nothing (detergents, oxiclean, Clorox, etc.) would get it clean. If someone dropped a potato chip on the trex, I'd freak out inside because I knew the grease stain would be there for years! I discovered Corte Clean at a local hardware store. It took away all stains, even a huge rust stain in a visible area that I had completely given up on. Yes, it weathered the deck's surface a bit, but the payback of a clean deck made it well worth it. Last year, I went back to the local hardware store and they had replaced Corte Clean with a similar product. It didn't work as well even though the application and granules was just like CC. Recently, I found CC on the internet and bought a pouch. Yesterday, I cleaned a majority of my deck with CC, but ran out. So, I finished with the left over of the similar product. You can actually see the line in my deck between CC side and the other product's side. CC was incredibly better. CC is good stuff, double your order so you don't run out.