I pulled out my Whitfield Advantage pellet stove to do a remodel of the room it was in. Apparently some moisture found its way into the pellets still in the augur when I pulled it out because the augur is jammed tight. I've pulled off the motor and the back plate of the augur. I've cleaned out the augur as much as I can, but the upper part of the augur isn't open so I can't get to it. My question is, should the augur just come out once I've pulled off the backing plate, or is there something else holding it in? I've tried turning it with vise grips on the shaft - no go. I've tried knocking it back with gentle blows of a mallet, but it doesn't budge. Any hints would be appreciated.