First season with Harman insert (Accentra 52i -TC). I love it (now that I'm familiar with the various burn options), except for one annoying issue. She'll shut down with "check fuel" error well before the hopper is empty, with 20-30 pounds left on sides of hopper that didn't fall into the auger opening in the middle. I have to push them toward the center, or add a full bag, to get her running again. I found a 2014 thread on this issue (now closed), so others have reported it. Suggestions were to try different pellet brands (I use Wood & Sons which burn very hot but pellets are in short pieces relative to others I've used). Another was the spray or paint graphite or some such lube on sides of hopper. Anyone have experience with this? Thanks & Happy Holidays!