That's good...

But not everybody wants to go through that every time they clean.

I've seen guys just turn the hose on their truck and flood everything...

A guy brought a truck into the shop one day..."it doesn't work"...
When I opened the radio compartment, water droplets were sitting on the Rx. and inside the Rx. case was condensation. I dried things out with a hair dryer and got it going again, but there was evidence that water had been in there before, and for some time, because all the wires had corrosion on them.