According to the Witch Doctor/Soothsayer I see my lungs have cleared completely since I started vaping, about three and a half years now. I was always on the quest for a thicker cloud, not necessarily a bigger cloud, to get the same feeling as a cigarette. That lead to dual coil stuff like the iClear series, then Foggers. They were all useable with tootle puffing, but I wanted more. That lead to modifying air flow and "bigger and better" toys to go with them. It's a lucky thing I DIY. Currently, between my wife (tootle puffer) and me (whomper) I end up mixing a half liter a month. Actually, the bigger RBA tanks are cheaper in the long run since they're so easy to rebuild, especially with TC, Ti and rayon.