I bought this Harman insert in May (to replace a 20 yr old Whitfield) & it's now getting regular use as our main heat source during a cold November here in Central MA. For the most part, I love it. I'm burning Wood & Sons pellets listing these specs: 100% Clean Eastern White Pine; fines 0.25%; PDI 99; ash 0.25%; BTU/lb 8,700. I've used about a ton so far. I've got the wireless remote & the stove regularly shuts down & restarts. I've been scraping the burn pot frequently (1-2x/day) due to much rock-hard clinker accretion down near the throat which requires aggressive chiseling to loosen. I'm keeping up with the ashpan cleaning. I haven't done the full cleaning yet (the prompt says only 60%). The problem has been that I've encountered several combustion or iginition error shutdowns, & lately there's a "pop" & much smoke at times upon ignition. Last night I hit reset after an ignition error & then noticed that burn pot was jammed full before reigniting, resulting in a huge, smoky fire for a time before settling down (dirty ignitor?). Should I just do the full cleaning now? Would a change in stove settings (e.g feed rate) or a different pellet brand help with the amount of clinkers, or is this normal? Thanks for any suggestions, & Happy Thanksgiving!