I purchased this stove last march and clean it weekly removing the wing nuts and vacuuming all the dust out, in addition to cleaning rest of stove. I also clean behind combustion blower fan periodically. I clean the outside exhaust also every few months. The auto ignitor on occasion will not light the stove. The pelllets keep stacking up, sometimes see smoke, no fire. I turned it on and off and unplugged machine. I am tired of wasting pellets due to this problem. Have contacted the place where I purchased the stove. They have come out for other issues, and when told about this issue, they are able to ignite with no problem. Does anyone know what could be the problem, as I scrape burnpot regularly, and keep the stove clean. Any assistance would be appreciated, as this is very frustrating. I am tired of the place I purchased this stove accusing me of not keeping the stove clean.