i mean like underneath smd components, under the gpu, inbetween/under mem modules (think they have over 100 pins for just 1 gddr2/gddr3 mem chip).
even distilled water is a bad idea to get on the pcb (even if you give it weeks to dry) cause mineral deposits from the solder/resin/"dust" is likely to be concentrated near and conduct between small traces when we're only talking fractions of a cm or mm.
especially since silver is involved, one you get a tablespoon of water on the pcb you might as well throw the thing in a pool in my experience, just you can't remove all deposits, and can't stop them from staying behind from even 1 drop of water in my experience.
Of course leaving a cheepo radio in the rain and letting it dry for a week or two isn't exactly the same thing. Since, such devices are likely to have higher tolerances for such things, don't have so many pcb layers/pins/traces/etc integrated into/onto/under the pcb/chips, and more space between components.
the issues people were having with 2d quality on older video cards comes to mind, once you get a capacitor/resistor wet it'll never have the same capacitance/resistance or quality, leakage etc.