Roman Duck wrote:
Elbow grease, soft bristle brush and a cleaner/conditioner; have had no problems. Do twice a year, In the fall a good cleaning and reseal of caulk joints, and then again in the spring, a quick cleaning and recheck of caulk joints, never had a leak . Just make sure you rinse the side walls well as you wash, you don't want the solution to dry on the sidewalls.
Agree. after I do the roof, I wax the sides to get anything off that could have run down. Learned the hard way. Even highly diluted Awsome. takes off wax, and can hurt decals.