I plan to use water with a dish soap. If it is not doing a satisfactory job, I plan to use something stronger
Keep us posted on the outcomes of the different solutions you experiment with. I like the idea of the ultrasonic cleaner rather than using the dip, having to find a place to dump the toxic dip liquid sucks.
Yeah, I'll let you know.
I don't have a lot of experience with ultrasonic cleaning (just with small jewelry cleaners my wife has used in the past).
I do know that not all cleaning units are created equal, and those that have harder tranducer construction (ceramics, or similar) will probably be more efficient at creating the conditions nessesary for cavitation, given a certain power rating. (i.e. 100W of power consumption by the transducers in one unit may be comparable with 60W in another).
In addition to power, frequency output also influences cavitation in various media, as well as temperature. There are optimum heat conditions of certain liquids to maximize the efficiency of cavitation.
So, when picking a liquid to use, it's probably important to keep in mind the other variables involved so something is not dismissed as useless when it might just need a different amount of heat energy.
Should be fun to mess around with.... I think the fun part is going to be finding something to use as a lubricating solution in which to bathe dry parts post-cleaning.