Shortly before Opus purchased his ProVari, he spent a goodly amount of money on an E-LVT
mod, which is supposedly "waterproof." As part of his review, he decided to stress test it. In his toilet. It spewed bubbles and never worked after that. Well, at least until he dried it out. It worked fine after that. It's a rather fun read.
http://www.e-cigarette-forum.com/fo...-waterproof-mod-part-1-a.html?highlight=e-lvt
He left off the important bit though: