Here's a picture
, worth the proverbial 1000 words...?
The part of the roof that makes big, bad dams is not reachable. The rake ends at snow surface. It had a 6’ longer section which broke off. Still, it would not reach, if I could hold it out. The dams form, predictably, where the warm spots are. The biggest are above two propane heaters on the first floor and the upstairs shower. For the upper (mid-level), I have eyebolts and a rope strung thru them. Time to change, maybe a metal roof will do it.