From what I see you don't have a problem at all.....except for the Greene Teams. VERY high ash the past couple of years. The reason the flame gets lazy is the holes in the burnpot get restricted by the ash. As soon as as you move the ash from the holes, I trust the flame gets better?I don't see anything wrong at all. Many Harman owners scrape the burnpot once ot twice a day. The soot buildup on the glass is exactly the same pattern that it builds up on mine. Now that it's getting warmer and the stove is on and off a lot, it will build up quicker. So all and all. I don't see a problem.