Thanks RC. Would water not be bad for a unit like this?
The water from my well would be bad for it. Too much calcium, iron and other minerals. However, the water from my still would be fine. When pure water evaporates, it leaves nothing behind.
Soap, (not detergent) likewise is pretty benign. Soap reduces surface tension, making water "wetter" so it can get into places where surface tension would prevent entry (similar to the "bridging" that powders experience). You just have to make sure to rinse well. (Hint: To keep water spots off of film negatives photographers often use Ivory Liquid Dishwashing Soap in place of the slightly purer "Foto-flow" designed for the purpose.)
The electronics are more problematic. Anything energized, of course, would be bad to immerse. A wipedown with a damp cloth is not particularly dangerous.
Spray keyboard cleaner should be safe for your electronics, too, though I would test a drop on the plastic and paint (spray onto a Q-tip and dab onto an edge of the hopper, wait a little while, but not so long it evaporates, then see if the plastic has softened.)
At the price of the unit, I would call RCBS for advice.
Lost Sheep