Hi! I finally quit cigarettes after 25 years and have been on e-cigs for about six weeks. I started at 22 mg, then went down to 18, and now I'm at 12. I went down on my nicotine because I am having severe sleeping problems. Also, I am allergic to PG, it causes severe coughing and seems to worsen my insomnia. I've tried melatonin, herbal remedies and sleeping pills, none of which work. My question is, how do I solve my insomnia problems, besides vaping zero nicotine three hours before I go to bed. I also am wondering if I am vaping too much? I vape different juices all the time so it's hard to tell exactly how much I vape in a day, however, I would say roughly 5 full Kanger Mini Pro-tanks. Does anyone think this is too much? As I can only vape 100% VG, I have a powerful battery that is set at 4.0 - 4.5. Can someone please give me some helpful suggestions? Thank you! Sleepless in Michigan!