So, I've been vaping now for about 9 weeks and since I smoke menthol ultra lights I started with 12mg juices thinking it would be enough, unfortunately 12mg of nic isn't enough and I'm thinking that between 16 & 18mg would be spot on for me (I've tried 24mg juices and they are too high). Also, I can only use VG juices as I have had reactions the PG, even when mixed 50/50 and lower. My question is, can I add unflavored VG ejuice to my existing juices to get me that 18mg of nicotine that I desire and how????