why do you want a higher nic level? I vape 12 now, which is a bad idea in my subohm rda, but I havent had a chance to get new liquids.
when I smoked cigs, I smoked for the buzz, that dizzy feeling you get, but I havent gotten a buzz from e cigs since the first time I bought liquid, that was 24mg because I didnt know what I was doing, and I stopped getting a buzz pretty quickly from that