I would highly recommend an Eco Friendly Composite Cleaner called Corte Clean (www.corteclean.com). It cleaned the grease, mold, and other stains from my Fiberon decking. It worked great for me and I tried many other chemicals and deck washes before purchasing it. It is to bad I wasted so much time and money trying other bogus products. Hopefully this email will save you and others from the head ache (literally) I experienced.