hello!
Have used Whiz carb cleaner for cleaning the throttle body of my car.
It works wonders but I had removed the TB off my vehicle.
The reason for removing it was the all the gung in TB would go to intake manifold and eventually to the engine. So the best practice would be to remove the carb/ throttle body of the engine and cleaning it with carb cleaner.
As far as the cleaning ability it works wonders!