[neoflex]

I usually purge right after lighting a stick before I take my first puff. Probably over kill but that's my ritual. I won't always purge while smoking unless I start to feel like I am getting unpleasant flavors which at that time I will purge like others have mentioned. If I know I will have to lay a stick down for a few minutes and there is a chance that it will go out than I will purge before laying it down and most definitely purge immediately after the relight which I do with a fresh stick anyway.