Of course it does! I am not a technician by far, but I know that moisture seriously affects the electronics, makes the minerals and other substances hosted in the water form mineral sediments that damage the circuits and make your phone no longer work, once the water dries all the mineral compounds that have the water will form mountains of material in your computer because these being solid can not dry like water, so do not get to bathe with the phone or at least do it very occasionally.

Yes. Don't try it...