I bought vegetable glycerin today to add to my e-liquid. How much should I add to make my e-liquid thicker? The e-liquids that I am currently using are as follows, Camel 16mg, Marlboro 16mg, and Export 18mg. I would like a little thicker e-liquid to produce more vapor. Should I try to add a little bit of vegetable glycerin to my Protank Mini 3's that I have my e-liquids in.