I want you to know that I think your product is great. We have had our Trex deck for 3 years. Like everyone, I thought it was maintenance free. When we developed severe spots earlier this year, I spoke to the deck installer (Archedeck of South Nashville) and he recommended a Behr deck cleaning product. It did not work at all. I was about to file a formal warranty complaint against Trex, and then read their site about your product. I could not be happier with the results. I called my installer to tell them the results, and they wanted to know all the info about your product. My sense is that they will recommend CorteClean in the future. Again, thanks for making something that does what it claims!