my cascade shutdown the other night and burn pot was almost full,thinking that's odd just cleaned the whole thing including exhaust going up chimney so I took it apart and re-cleaned it all nothing found , I just watched left side of burn pot start to fill up again and thought what the heck, closed of air supply and burn pot went back to normal then auger started spitting out pellets like a dam slot machine lowered feed rate let it burn down brought rate back up and all is fine now, what would make the auger decide to keep dropping pellets