Hi. I'm new to this forum. I have a question that I am rather puzzled about. I have a Summers Heat 50snc-30 stove.The stove burns great,puts out good heat,but the problem is that the coals will not burn down to ash.I have to take coals out every other day just to be able to put more wood in. I am using two year old ash and hard maple at ten percent moisture.Why will the coals not burn down to ash?