Corte Clean is our go to deck cleaning product for our composite deck. There's no other cleaner we've found that can do such an amazing job! The process of cleaning is simple...we have a rather large deck and my husband and I can have the entire deck cleaned in an hour or so with the help of Corte Clean. I've even managed it by myself. We built the deck roughly 12 years ago and, after each Corte Clean cleaning, it looks brand new! Prior to finding the product, we looked into having the deck professionally power washed and it didn't come out that well and the price was hefty. Corte Clean leaves our deck looking new and for a very reasonable price. We are huge fans of this product and use like clockwork each and every year. Thanks Corte Clean!