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Quite often, when I fire the BGE up with the vents wide open and the lid down to get a nice hot sear on for some steaks, the TelTru thermometer in the lid will climb right past the end of the temperature gauge and start nudging past zero again.
Is this likely to damage the thermometer? If so I'll need to keep a much closer eye on it while lighting it for steak cooks or fajitas etc.