My newer, second unit has been acting strangely as of late. The resistance keeps jumping around, forcing the volts to change while in wattage mode. I checked my atomizers, switched tanks, etc but it keeps doing it. Even placed the same tank on the older Evic VT and it's smooth sailing with that one.
I plan on giving it a good look over and cleaning over my days off, but it kind of bums me out to discover this. Guess I've been lucky to date with failure rates of mods purchased, but still is depressing.
bummer to hear...
maybe try some lube on your center (+) pin (make sure it's springy)
(don't use a petroleum based, it will eat O-rings)
good luck