Corte Clean Support suggested that I treat my composite deck with Corte Clean in mid-Fall before Winter weather set in but not rinse it off and that would minimize my Spring clean up as Corte Clean would continue to work over the Winter. Usually I have algae, mold and grime to clean up after Ohio Winters but I am completely amazed by what my deck looks like in May! No scrubbing and intensive washing is required this year. Instead of making a mess, Mother Nature's attack was harnessed by Corte Clean to clean my deck over the winter and keep it clean. I just have to sweep it off and perhaps give it a light rinse although Spring rain might even make that unnecessary. The close up I submit shows what the deck looks like without me doing a thing. Thank you Corte Clean for the time-saving product that makes my deck look new!