Off-gassing

Had to check...ammonia in non-flammable under normal conditions, without a catalyst.

I purge cigars without lighting the gasses whenever I think it will help the flavor, usually towards the end of smoking it. It normally only lasts a few puffs before it needs it again. There was a thread here about purging right after lighting to remove the flame gasses, but that didn't require lighting the gasses. If they are out of the cigar then I won't waste lighter fuel on them.