I had a very odd experience today with my latest few bags of Sparkman pellets from Walmart. Over the last couple of days, I started a new batch of these pellets. I noticed very high ash production (piling up to the burnpot !!). I kept knocking the pile down. This afternoon, the stove just went out. I restarted it, but it didn't sustain a fire. I let it cool, gave it a thorough cleaning, even checked my top-vent area (not clogged), and tried again. It took 2 tries, but it is running again now. During this, I called my installer (Fireplace Co in Lake George, NY), and the guy who answered was very knowledgeable and helpful. He said the high-ash pellets had probably ashed over the inside of the igniter area. He recommended I switch back to their pellets (Energex). Since I bought the stove for the purpose of saving money, and don't want my $5500 investment to be for nothing, I want to still use the Walmart pellets, but I guess I'll have to make sure I clean the igniter area frequently if I see high ash production again. And maybe clean every 2 weeks minimum. Any thoughts ? Today I was home, and it was 45 F outside. But I can't have the stove quitting if it's 0 F outside and I'm at work !!