mod showed 0.00 ohms. I figured my coil was shot so put a new .5 ohm coil in. Mod showed at 4.92 ohms. Cleaned mod connection and tank connection, still no better. Took coil out and dried down in where the coil goes and still no luck. Took the same coil and put it in my subtank mini. On the same mod it reads .63 ohms and is vaping fine. What could be the issue with my nano?