I'm amazed how we suck in cigarette smoke with how many known carcinogens without a thought but balk at the thought of using a silica wick for vaping. I've used silica, cotton, ss mesh and combinations of those and have found silica and ss mesh to be my favorite. SS mesh tends to be more finicky and really has to be oxidized well or wrapped with some cotton. That's on a provari though which seems to be a bit pickier on what it'll run. I'll run silica wicks most of the time just for ease of use. 30 years from now they may decide silica wicks cause some kind of pulmonary fibrosis or cancer but heck they might find that about the pg or vg as well. This is all fairly new stuff. How many years did people smoke cigarettes before it was found to be carcinogenic?