Originally Posted by dsbrantjr

I put about an inch of water in my cleaner tank, then place a Pyrex beaker with cleaning solution into the water, which couples the ultrasonic energy efficiently into the cleaning solution. This eliminates having to clean out the tank between cleanings. I use Simple green, Dawn or odorless mineral spirits; the real stuff not the milky substitute. One could also use alcohol or really anything; Dawn and water work great on eyeglasses. It is kind of cool to turn on the agitation and see the gunk come out of the little crevices