Sitting at the puter will do it Menville, I've been vaping about 6 weeks now and settled on about 2ml of 24mg a day. I was a 2-3 pack of Camels a day guy for 24 years and switched to vaping cold. I find that on days when Im at home and using a passthrough I use much more liquid, when I'm out and on batteries I vape much less. The first few weeks I was also experimenting with flavors which uses up much more liquid. Im still new I guess, but once I found what I liked, and got into a routine it evened out a lot. Also, it depends a lot on the strength of the liquid, being new, 18mg wasnt quite enough for me, and 36mg made me want to sit down, so Ive settled on 24mg for now. Anyway, I guess the point is, give it time, find out what nicotine level is good for you, and let the novelty wear off...
Good Luck, Dre