Gutter cleaning can be a profitable add-on service for professional window cleaners. Fall is when the gutter cleaning calls will start to roll in so be prepared with the right tools. Handheld tools such as the Gutter Tool and Gutter Scoop are very popular products. Gutter cleaning solutions like Gutter Zap is also in stock. It will remove black streaks from gutters. Browse other Add On Services like scratch removal, screen care and stain removal.