I've put quite a few PCBs through our dishwasher
(well it's "ours" when I
want to clean PCBs, and my wife's when it's dinner plates). It's amazing
how many useful pieces of equipment are disguised as domestic appliances:
the machine for cleaning keyboard keycaps and shell cases does an
excellent job of washing clothes, while the tumbling machine for drying
them off also works for socks and shirts. The device in the kitchen for
baking small spray-painted articles can be used for pizza and muffins. And
so on...
Don't forget the device for rolling out pie dough can also put lumps on
your head. Mess with certain wife "critical" items at your own peril.
In our house;
Leaving anything remotely computer related on top of the washing machine
lid is asking for it.