Click on the links below for some helpful information  ICE DAMS   Aluminum Gutter/Siding Cleaner Formula Helps to clean strips / tiger streaks off gutter 1/3 cup laundry detergent 2/3 cup trisodium phosphate 1 quart 5% bleach 3 quarts water Mix, apply, rinse immediately Or click on the link on the left for Streakgutter