[QUOTE=Merrymeeting;88413]Well... there is one other way that many of us use. Just eliminate the heat loss by closing for the winter!
It's often colder inside than out. By the time the sun is warm enough to cause melting, the cold that causes the ice dams is mostly gone too.
I use heated wire that you can buy at true value in Laconia. Just hitch it on the roof in a V pattern or lay it in the gutter and it will melt a path for the water to run off.