I've had my subtank mini that I use on my istick 30w. It was working great for about 3 weeks up until now. The ohms keep jumping from 0 to1.4 to 2 on the istick resistance reader. I'm using the mini rba and it was .6 ohms the past 2 days but just started jumping around today. I've tried everything but can't seem to figure it out. Any help is appreciated.