while i have been using this product for a few months now i am not sure how long i can continue. when it works its great, when it doesnt which is usually its very frustrating. I started with the mod. about 1 out of five of my cartomizer work well, and those only work for a few days. they either would burn right from the get go, or be clogged were i could get very little vapor. (i put a few drops of liquid in the cart, not in the middle part, and prime a few times by placing finger on bottom and sucking a few time, not overflooding) i recently have purchased a few vapor titans and while they dont burn like the mod, they consitintley get clogged, bought 5 a week ago, 3 were clogged right at the begining and the other 2 lasted about 3 days each. ive noticed that with flavored juices they clog quicker, maybe a day if im lucky, so ive stopped using those, and even with the kamel i get only a few days. any ideas? is the quality control of these just that bad? my dad who introduced me to these also has the same issues..