Hello fellow Toon's this is my second year with a Bennington, Sedona and love it. I am docked on a river and have noticed the brown stains below the water line that are taking over my very nice new toons of last year. I am looking to find the best way to clean them and keep them as clean as possible. I realize that scum, and river crap is part of the deal, but am looking for some good advice. thanks