today i put in 2 splits north south 2 east west roaring fire turn down the air gets to about 625-650 problem is i have chunks of hot coals about 3-4 inches deep when i move them around underneath they are black ..not burning its been well over 8 hrs and everytime i burn i get this i feel like it it wasted heat and then it makes me lose space when reloading how do i get these to burn down... i am tired of opening my air to make them burn because now its going up the chimmney how do i get just enough coals to start another fire?