I've wondered occasionally why they don't make waterproof versions of some of these things (apart from the fact its more profitable not to, of course!) My wife ruined a set of electronic scales recently by wiping it with too wet a cloth. Even phones you could expect to get pretty wet occasionally - campers, festival goers, etc.

It would't be very difficult to put the majority of the circuitry in a sealed container and the incremental cost would be pretty low. I'd certainly pay a few pounds/dollars extra for the reliability.