Hello All, I am a new Harman Advance owner/user. I am very satisfied with this pellet stove. I have a question about the feed setting, I know the manual says to set it at #4. I have it set at 4, but I think I am getting excessive ash. On the edge of the burn pot I can get up to 2 inches of ash where it falls to the ash box. Is this too much? I am not getting unburnt pellets into the ash box. I am using Premium pellets exclusively. I am vacuuming the stove about once a week and scraping the burn pot, I also find alot of ash caked on the top heat exchanger. I appreciate any advice, this is my first pellet stove in my first season. Thanks.