i was at least a pack a day puffer of Marlboro Menthols for 20 years prior to purchasing my first e-cig. i've sampled various juices, mostly 18mg to 24mg, only to find myself literally chain-vaping...literally all the time. it's a rare occasion for ten minutes to pass between hits...and my hits are usually three to four healthy puffs. before i leave for work, i fill three carts, one on the atty and two in reserve...they're all three done for in 5 hours or less. any thoughts on this?