Well, maybe not the JPL after all - not enough watts, I guess.
http://www.amazon.de/gp/product/B00...&pf_rd_t=101&pf_rd_p=463375173&pf_rd_i=301128
This one seems to be getting good reviews, it's 50W and it's relatively cheap on Ebay.de (shipping within EU).
I've heard you should be using water in the 60-70 Celsius/140-158 Fahrenheit range for an ultrasonic cleaner to clean properly - any thruth in that?
Actually this recommendation (to use hot enough water) came from someone who repairs & cleans mobile phones (or something). His opinion was that cheap ultrasonics are fine as long as you know how to use them.
He was using a Carrera brand 50 watt cleaner and that's where I got the idea from.