We are now on our second home with a composite deck. The first home was an older composite that was not properly cared for. Using Corte Clean worked very well. This made me a believer in the product. In our current home the deck is new. Now we use Corte Clean each year and it's a simple maintenance process that makes the deck look clean and new each year. Would I recommend Corte Clean? My brother-in-law let their deck go for 20 years without cleaning. It was so bad I wasn't sure how it would clean up. I purchased the Corte Clean for him. For his mold and mildew I was concerned it wouldn't do a good job. It took some light scrubbing cause it was so bad, but it made a huge difference!! "WOW" was what my brother in law said. I tell everyone I know about Corte Clean and encourage them to give it a try. When you do it every year, it's spray on and rinse off, no scrubbing needed just as the directions tell you.