Cheers for the advice, canniscam. The last e-cig I had used the little sponges to hold the liquid (liquid dripping out of the mouthpiece was why I stopped using it), and I just used pre-filled cartridges - haven't had to deal with cleaning the gunk out of tanks before!

Heh, I'd never consider submerging a battery in water! The battery contacts are a little grimy here and there - probably because they're carried in a jacket pocket with no case (oops) - but I can easily clean that off the same as any other electrical connector: cotton buds, isopropyl alcohol and care
