Hello My friend has an Osburn 2400i fireplace insert wood burning stove with circulating fan. It is a nice stove, but when a log came within approx 1/2" of the inside glass it left a round burn mark. Is there any way to get rid of this mark without spending the $140.00 for a new door glass? A little hard to see in the pic below, but I am sure you guys know. It is a faint round creasote color mark that does not come off with glass cleaner.