So I finally made the move to using a passthru when I'm at home, which is quite often since I work from home too. (Yeah, I know. The erudition displayed by this move is blowing you away!) Anywho, it's a DSE901 pass through with an adapter for 510 atomizers. It works great but every once in a while when I pick it up I can feel a kind of vibrating sensation, "tingly" is the best way to describe it but not in an electrical shock kind of way (i.e. the kind you get when you put a straight pin into an electrical socket; don't even ask me how I know what THAT feels like). It's not constant, it doesn't hurt, there's no extra heat and there's no degradation in performance. However it IS driving me nuts not knowing what it is. FYI, it is never hooked up directly to my computers (as a software developer who depends on them for my income I don't like any added risk, no matter how slight) but rather to an external USB hub that I have dedicated to this usage. So, any ideas on what's causing this? TIA, as always!