I've had this stove now for a few months and called customers service about what I considered a dirty burn, the had me cut back on the feed rate from 6 to 3. Which is fine I now have more control of the heat and a 40lbs of pellets lasts longer, but my burn pot is still overflowing with coarse looking ash within about 8hrs of running on heat setting 2-3. Does the amount of ash in the pics look right? I have nothing to compare them to.