I have this mini protank 3, and it was working just fine. Upgraded to rda and different battery, and I hit the old one, the protank, and it feels almost like it is clogged. I've taken it apart, cleaned it, put a new coil in, and sucked on it to see if it was good. But then when the coil is in the base, and I fire it up, it like barely has any air flow. It has one of those adjustable airflows on it, and it shouldn't even be any different. I don't know if it's just i'm used to my rda or what, but I really don't think it was this difficult. Don't know what to do or what.