I was inspecting my stove yesterday to get ready for the upcoming season. I noticed the top plate in the main combustion chamber badly distorted and burned/rusted through. There is easily a 3 inch hole in it. My initial thought was overfiring. I don't believe this is the case. The rest of the stove parts all look fine, including the air tubes that hold this plate in place. The owner's manual does not specify an actual temp for the stove or flue. I've monitored flue temp with an infrared thermometer, but I don't know how accurate that is on double wall pipe. I just ordered a condar flue thermometer the other day, but don't have it yet. I have never had much creosote buildup, though high temps would probably burn that up. Any ideas?