[FJames]

Water generally doesn't harm electronics, even hot water with coffee in it. The problem is that there are enough dissolved mineral salts in water for it to act as a weak conductor, which is sufficient to disrupt low-power CMOS electronics as long as they are wet. Usually the electronics will work again when you dry them out completely, but you have to open everything up to get all the moisture out. Putting it in a sealed container with dry rice or silica gel works, but very slowly. I prefer a hair dryer on low heat.

You also might encounter the problem that the electronics work again briefly after they dry out, but soon stop working again. The reason is that the mineral salts deposit out as a white or brown crust as the water dries. When very dry these salts don't conduct, but even a little moisture absorbed from the air is enough to start them conducting again. The only way to remove them once they have deposited is physical scrubbing with something like a toothbrush. Pure distilled water doesn't conduct, so it helps to wash away the non-pure water right away with distilled water if you can. It doesn't help after things have already dried and the salts are deposited. Sometimes it has taken me two or three cycles of washing with distilled water and scrubbing to get things working reliably again.