We recently got a new stove and like them all should keep the glass I suppose somewhat clear. Anyway I end up cleaning it most days as it does get cloudy/foggy and a bit black on the sides. I'm wondering is this normal or is there some method/old wives tale about using the yoke (can't think of the technical name) to keep it clear. Asked the salesman and he told me to keep it closed and open it fully when I have the fire going well. Also if leaving it on overnight not to close it until the flames are well down.