has anyone used a FUMA e-cig... i bought one last week...so far it doesnt seem too bad, now im wondering... it doesnt seem to produce alot of vapor most of the time... its a 2-piece... i am thinking about buying some e-liquid and trying to refill one of the cartomizers. is the lack of vapor because the liquid they use for carts sucks or is the battery itself.... i have noticed that if i add a drop or two of tap water to the cart it lasts a bit longer and also seems to hit pretty good vapor and TH... just wanting some input on any other suggestions... the battery has two small holes in top and the cart has four slots for air... covered some up with tape but didnt notice a difference... covered one of the holes on the battery and noticed a bit more vapor...