Does anyone have experience with the inexpensive ultrasonic jewelry cleaners sold on ebay? I occasionally have use for something like this for cleaning up shutters, it would be nice to drop all the bits in for a bit and have 'em come out clean.

Also, what kind of cleaner is safe to use for such a job in one of those?

Of course I send any shutter that I want to rely on for accuracy to Carol Flutot

Thanks in advance,
Nathan