Is anyone burning these pellets. I bought 2 tons this year and hate them. The ash pan is full every other day; the glass is completely covered; the burn pot is never full. When I dump a bag into the hopper it is full of dust like pieces. The pellet is dark. The bag says it is PFI certified, hardwood blend, low ash and high heat avg 8,200 - 8,300 BTU's. Environmentally friendly and clean renewable energy. The heat seems to be ok. These pellets clogged up my vent pipe really bad and I had a puff back. I have a Breckwell P23. Yes it's been cleaned.