I know these stoves aren't he quietest out there but I just want to make sure I'm hearing what everyone else hears. What noises if any should come from the bottom auger/auger motor? My stove seems to have a constant scratchy noise coming from the auger motor. I can't remember if I heard it last year or not and I am driving myself nuts trying to figure it out. I have been scraping the carbon buildup from the auger tube and I don't hear any binding or squealing. It's just an annoying faint scratchy noise.