My buddy had the exact same problem with his new saw. He was using a fine-tooth blade for clean cuts, but that just built up heat on the bones. Switched to a skip-tooth blade and slowed his feed way down, and the burn marks stopped completely.

But what if you actually need the heat? I mean, a blanket is fine on the couch, but what about when you're walking on cold floors or just getting out of bed? Idk, maybe it's just me, but sometimes cranking it for a bit is the only thing that really warms the whole place up fast.