Ok, I'll need to build strength before I manage to leave that motherboard in the dishwasher all alone 
In the past I was always told that water and computers don't go well together!
As long as you leave it off a while before washing it (let caps discharge) you'll be fine. No electricity = nothing to worry about.
Example: I washed a USB keyboard in the disher a few weeks ago. I let it dry a whole weekend before reconnecting it to the computer. Resulted in a keyboard that not only looked new, but also had that "new feeling".
I didn't remove a chip. Just peeled the keys of (to get a deep clean) and threw it in.
