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I used to clean my watches with one ultrasonic clean like this one. I would fill the tank with water, about half full. I would then use a small class jar filled with the cleaner and set it in the water(enough so that the glass would not float). The ultrasonic waves transfer through the water and the glass into the cleaning solution. I would then remove the parts out of the glass jar and then replace the cleaning solution with the rinse. To tell you the truth, I never really ran the parts with the rinse through the ultrasonic cleaner. I would just swirl the rinse around in the jar for a few seconds then remove the parts one at a time and blow them dry with my dust blower. This method always worked fine for me.