All the "ultrasonics" do is introduce a mechanical wash into the system. All they do is form micron sized bubbles within the medium thru cavitation. The sound waves produce the cavitation. There is a lot of thermal energy stored within these bubbles and when they hit the surface of the ball, viola, a "mechanical" process is created to lift the oil out of the pores. Our company uses ultrasonics in addition to heated solution to clean parts before processing.
Its not rocket science, de-oiling a bowling ball. Heat in some way, physcially have a way for oil to be taken away from surface of ball. Air, water, towel, dishwasher jets, whatever you want to use, use it. All these methods, Rejuvenator, Innovative, Jayhawk, dishwasher, bath tub under running water are the same. They heat the ball and remove the oil that comes out. Arguing about it is like arguing which beer is better or whether Ford is better than Chevy.