My very good friend Henry has a most effective way of removing carbon deposits from the inside of burner heads. He removes the burner head from the riser/spirit cup and then removes the jet. Using an oxy-acetylene torch he then heats the burner to a dull red. [The squeamish should now look away]. He then shuts off the acetylene to the torch and GENTLY directs a jet of oxygen into the base of the burner. This must be done with extreme care since the carbon now burning in the oxygen stream inside the burner head generates plenty of heat and could damage the burner. He adjusts the oxygen flow to keep the carbon burning but the burner head not too hot. Plenty of debri gets blown out of the hole where the jet nomally resides so protective clothing, goggles etc. should be worn.
I should stress that I have not done this or indeed seen it yet but will hopefully when Henry returns from his lamp and stove collecting trip to Crete (not sure his missus is aware of this aspect of the trip!).
I'm sure Henry won't mind me sharing this on the forum in his absence BUT PLEASE TAKE CARE IF YOU DECIDE TO TRY THIS.
Colin.
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