SPT
New member
I like the chainsaw idea.
They sell (Home Depot, I think) little hockey pucks of salt. You throw them up onto the roof, and they melt into the ice. I've never used them, but a co-worker swears by them. Regular ice melt works even better, but you have to climb up with a bag and a scoop. Toss the stuff onto the top of the dams. They'll be gone in a few hours.
JayC
Do a search for Quick Ice Dam Cure. I tried it and hope it will help. It does cut a channel through the ice above the gutters. "A picture is worth a thousand words" but basically filling an old pair of pantyhose or some have suggested tube socks with ice melt and laying down the roof and over the gutter will keep it in place long enough to work down through the ice. Hopefully that will give anything that melts a place to run off the roof. I also piled up some ice melt on top of the ice above the downspouts to open them up as well. Maybe worth a try.