Hi =)
Well two of the ‘basics’ have already been suggested (or covered):
-
Try different tanks to eliminate the possibility of a bad atty, or series of cartridges (assuming the atties are different brands and use different coils). You could have an entire blister pack of bad coils… Which is why I mentioned different brand atty, but given how many fit in different brands these days, I figure I better specify…
-
Cleaning the 510 has already been suggested. Which is great for the exterior, but does nothing if the short is inside. (more soon)
-
The other thing I would mention is taking a small pick (as in: probing device) and trying to see if you can pull UP on the center (positive) pin.
There are certain atties which have excessively long male 510 connectors, and if the female 510 connection is too shallow, it tends to “bottom out” the center pin, sometimes “permanently” locking them in place.
As for the “more”… What’s more is if liquid has gotten down into the device, with these being a “sealed unit” (waterproof, etc), you’re pretty much screwed.