Off-gassing

I had no idea about any of this "nonsense".

I mean I purge every so often when I smoke by blowing for about 10 seconds or or so, but I had no idea that it took 6 to 9 times that to get it out.

Question: Is holding a flame to the purge merely for theatrical purposes?

Carrying two lighters with me (torch and soft flame) while standing in a river while my other hand holds a fly rod might be a little difficult...