Whats the best way to break up ice dams on the roof? There is over a foot of snow on the roof (8/12 pitch) and of course ice underneath it, so footing is going to be impossible. It's 22' up, but if I'm on the porch roof its about 10 feet up. I can't even get a hose up to the top to pump hot water down to it. Any ideas? Its beginning to leak into the house via the windows right beneath the dam.