I have been using the ego tank system for about 2 weeks now and I have noticed that after 2 to 3 days of using the same atty it starts producing vary little vapor and flavor ....... I bought 5 low resistance attys from wordup and so far 3 of the 5 do the same thing ...... I have tried blowing them out and cleaning them in rubbing alcohol and still no improvement ....... I'm using Johnson creak for my juice its dark but vary thin Idk if that's the problem or what but these attys are too expensive to be burning through them every 2 days ........ any advice ?