I've been analog free for 2 1/2 months now, and I started vaping with 18mg juice. I used this concentration for about 6 weeks before I switched to 8mg. I was using about 2ml a day of the 18mg. At first, I didn't find myself vaping much more than the 18mg, but lately I find myself pulling off my 510 all the time. I'm up to about 3ml a day now of the 8mg. I don't waste much as I just use the dripping method. A few weeks ago I was able to drain my 1300mah hello 016 in a matter of 8hrs. No telling how much I used that day. Since then the battery will last me about 12-15 hours. I was thinking my next order would be 4mg juice, but I don't want to switch if I'm going to be vaping 4-6ml worth a day. It seems to be worse if I'm working in front of the PC all day. Pretty easy to vape every other minute of the day. How many ml's are you using a day?