I took apart the first one to see what was going on inside.
View attachment 107040View attachment 107041
That bottom plate lifts right on the connector and that wire you see is the possitive going down the center tube, through the plate and onto the 510 connection.
It goes up the middle tube into the ceramic cup and them around the wick.
So here is what i think is happening, juice is wicking up the wicks, it hits the coil and slowly flows down the positive wire. There is nothing stopping it, the coil gets wet from the wicks and that liquid is following gravity down the positive wire through the center tube.
Same idea as a drip loop on a strung phone cable. Water hits the cable or flows onto it from the pole. It travels horizontily along the cable towards the lowest point. To stop it from getting into the actual breakout housing on the cable or box. They put a simple loop in the cable. The water will flow down to the loop because its lower than the cable and drip off.
The positive cable is acting just like the drip loop, its giving the juice someplace to flow from the wicks.
These are basically re-jiggered fluxo's, so why didnt this happen to them? Because the positive wire, like the negative wire on these, went through a small hole in the cup and back into the tank. So it was happening, but it was draining back into the tank, not the center tube.
These things are like old super cars, performance is amazing but they come with reliability problems.