quigley,
i would use halon except i am in the rig and like to breathe. co2 is not allowed by our fire marshall.
since we have been doing so much catering every week we found that cooking everything in disposable hotels saved so much in clean up time that we just continued doing it in both the fec and sm150.
only time i got a burnt gasket smell was WHEN THEY WERE BURNING
since the change we have never encountered any further problems and thanks to the fire i figured out a way to save both clean up time for pans and clean up time for the smokers so i still get plenty of sleep during a long work day every weekend (from 9am friday to 3pm saturday)
jack