Hi everyone... been lurking here a while, but now I need some help. I installed a Harman P43 in late October. Bought two tons of O'Malley pellets. Stove worked fine - the pellets burned a little dirty - had to clean the glass a lot - but no real problems. When the ashcan filled, I cleaned the stove as per owner manual instructions. Where before the ash was gray and fine, now the ash is black and thick, and i have a lot of sparks flying around. The feed rate has always been set to three, room temp set to high, and thermostat between 70 and 73. What is going on? I keep my pellets in the garage - is it possible the pellets took on extra moisture? I've re-cleaned the stove, turned the feed rate down, turned the room temp to the middle but the ash is still thick and black.