I agree with the changing of a movement outright. However as a watch tech, I'm forced to repair small parts (circuit, wheels, levers etc..). I'm doing batch servicing for swiss quartz brands so constantly busy. Would be a dream to streamline my cleaning services let alone replace a movement! Sadly the big boys don't like replacing movements as, believe it or not, it's not cost effective for them.
As quoted above with the technique of brushing lighter fluid/benzene, this is what I have been doing and it's working pretty well so far. I was using isopropryl alcohol which worked equally as well.
I think the long and short of it is that there is no real way to sprint through this with an ultrasonic tank. And dare I say it... It's not **BLEEP** worth it... Especially for the money! :growl: