Anyone else have trouble with these GE dishwashing machines?
Mine cleans dishes well enough, but the gaskets leak easier than any other dishwasher I've ever had. I replaced the gaskets a few months ago, but if a little bit of debris builds up then it's leaking again. Also, the racks are badly corroded, but the machine is only maybe five years old. Anyway, it's just kind of funny that my aunt is coming over tomorrow and the last time she was here she noticed the dishwasher was leaking.
Sounds like you live in a place with very hard water and you're having problems with mineral deposits.
If so, try dishwater salt (not table salt) or vinegar.
I would be wary of using vinegar. The hard water deposits had sealed the electronics enclosure after the gasket started leaking in my dishwasher, after I ran a cycle with vinegar it shorted out.