Then something is not right. I was a three pack a day smoker and I have been content with 3 to 5 mls per day for nearly three years now. A pack a day smoker should theoretically be content with 20 mg of nicotine a day delivered (or about 1mg of nic per cigarette smoked). And based on my own e-liquid-strength/consumption-volume pattern, I estimate that a vaper needs to consume about 40 mg of nicotine in order to achieve 20 mg of nicotine delivered. Thus, a rough formula would be:
# of Packs Smoked X 40
----------------------------- = # of mls (per day)
# of mgs per ml e-liquid
Thus, in my case, it was 3 X 40 = 120, and 120 divided by 24mg strength e-liquid = 5mls per day.
Or, in the case of 40mg strength e-liquid, I would only need about 3mls per day (120/40=3).
Yeah I think I got too low a nic level. Started with 8mg, my next order I have upped it to 16.