From what I have read in the long past of this forum is that when people have done a water cleaning like this (i.e. dishwasher), they let everything dry in pieces for several days before putting everything back together. If you wash the switches, you would have to be extra careful, like lowpoly said, that water does not get trapped in them and other, similar components. I would aslo watch out for hard water (water with a lot of minerals in it like limestone). As it drys, it can leave the mineral residue on parts which, overall, shouldn't be too bad, but even a little residue in the switches or other moving parts could be trouble as the grit would be rubbing against the components. If you don't have hard water or have a water softener, you shouldn't have a problem. Around here, there is a good-selling product called Lemme Shine (I'm sure it's available in other parts of the US for sure). It is essentially powdered citric acid, and it eliminates the residue caused by hard water on dishes in the dishwasher. You can also dilute in water, and use it in a spray bottle to clean bathrooms and such. I use it at my house, and it works great. On cheap metal (like the chrome used in some kitchen utensils) it can be corrosive (stainless steel is OK, though), so be careful if you want to use this on a keyboard.
