Weird indeed. I would put it to pieces, check all the insulators, clean everything and then re-assemble. There's not much else to try...Lately I've been facing an issue with the dvarw. The resistance is jumping all the time, from 0.9 9ohm (what it should be) to 1.83 for example. I checked the 510, the leads are properly cut, the coil is not touching the airflow. I wonder what this is about... Changed for a different mod but I can conclude it's not the mod. Weird.
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