Re: Smoke Purging?
Kind of going off of what speel was saying...
Some people like to purge on occasion, because on some hookahs their purge system will push air up the stem. The air going up the stem will 'blow' on the coals a bit, as if you were blowing on them from up top to keep 'em hot.
If you're purging all of the smoke out after every single pull, you're not smoking as effectively as possible.