How often does the throttle carbon deposit clean up?

About "How often is the throttle carbon deposit cleaned?" Introduce the following related contents:

Throttle carbon deposit shall be cleaned every 20,000 kilometers. The benefits of cleaning are cleaning up carbon deposits, improving intake and injection accuracy, improving fuel efficiency and prolonging engine life. Influence of dirty throttle: slow or unstable growth rate, accompanied by unstable idle speed; Power decreases and fuel consumption remains unchanged, or power remains unchanged and fuel consumption increases; When there is no fault in the ignition system such as spark plug and battery, it is sometimes difficult to start cold. Throttle is a controllable valve that controls air to enter the engine. After the air enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, and the combustion is successful.