How to clean the throttle and intake manifold of Volkswagen Santana?

The shape of the ultrasonic cleaning machine is similar to that of the freezer selling popsicles, but it is all stainless steel, filled with water, and the things to be washed are put in and covered. Then, after the ultrasonic generator in the machine works for half an hour, the sludge attached to the intake manifold is dissolved in water, washed with clean water and then washed with gasoline, and the car can be loaded. Remember to cut off the power.