hello all i have a Harman PC45 and burning ''fiber energy products'' wood pellets that came from Arizona i bought from TSC and am not real impressed with them lots of ash and even tar build up. im mixing 1/3 corn and its helping with more heat and less ash. been thinking next year going to just corn but have to have the stove switched diagnostically to do so. even my glass window has build up daily that needs cleaned off from these pellets. whats the negative with strait corn burning ? thanks am new to this bio heat lol