I started stepping down my nic again from 36mg (when my Dad died this Feb) to 10 mg right now. I DIY, and really only vape one juice, so I have been mixing up a months supply at a time. Next mix I will be going down to 8mg, but if it does not work for me, I will just add a little more nic base to raise it back up. I have been going down slowly, and still only use an average of 3 ml a day. I have been vaping for 11 months, quit a ppd marlboro smooth habit using 24 mg, and was down to 12 mg by the beginning of this year. That is when all h#ll broke loose, Dad sick, son had emergency surgery, my last semester of school and a long personal illness (5 weeks of visiting nurses and IV's) but by increasing my nic to 36mg, I avoided going back to analogs.
Don't be afraid to step up the mg when you need to- the point is to avoid the cig's!