I am new to the pellet stove, this being my first year heating with it. I have a ST Croix Hastings and have burnt only Hammer pellets in it. The stove is still running fine and producing the same amount of heat but every day I have to scrape a very large block of solid ash out of the burn pot. It did not always do this. I clean it daily and weekly as described in the Manual, and just recently tried the "leaf blower " trick and I am still getting this daily build up in the burn pot. Is this normal and expected, or am I not getting something clean, or is there something wrong with my stove.