I had a really wierd problem and it turned out it was because of a 510 to 510/eGo adapter I was using.
Seems the center pin in the adapter is made up of two parts, which can actually be unscrewed;
the problem occured because over time the thread on that centerpin screw developed corrosion.

Seems the center pin in the adapter is made up of two parts, which can actually be unscrewed;
the problem occured because over time the thread on that centerpin screw developed corrosion.
