I usually just take a shovel or two of ash out of the very front of the stove every time I fill it with wood. With a hole dug out next to the door, I rake it full of coals from the back of the stove and then pile in the wood. Since my draft controls are mounted on the door, everything close to the door burns first and is complete ash, so it might get a amber or two when I scoop out the ash, but 99.999% of the unburnt coals stay in the stove. On warm days, I let the fire die way down, (12-14 hr burn times), enough so that the stove is warm to the touch, and will scoop out as much ash as possible with out removing coals, rake the coals to the front of stove and pile it full of wood.