Using the carto for dripping didn't last very long. It soon lost performance so I took the diaper out and it had a long burn hole in it. The carto is history now but I sure would like to know why the resistance was so high unfilled and then down where it should be when full. It probably got burnt when I put it on my Riva because that is when I first got the burnt taste. 3.7v shouldn't have burnt it when it was fully filled.
Like stated previously, high ohms indicates a bad/loose connection with the coil. When you filled the carto, the liquid most likely helped the connection (think water on bare electrical wires).