please help, i have problems with the catridges. im a new user and have been using ecig since 2 days ago. the thing is i have replaced my catridge 5 times!! i dont think i am doing the right thing here and if it is correct, then this is an expensive quitting therapy!! can anyone help me with this? i changed the catridges because the smokes are lesser than the new ones. i used each catridge like 50 inhales in 4 hours and changed to a new one.. when i was smoking cigarette it was one box of mild 7 will and lasted me 3 days... 20 sticks for 3 days equivalent 7 sticks per day.. appreciate an input please..