Do I have to clean the throttle every maintenance? How to clean it specifically?

There is no need to clean the throttle every time. The throttle has its own adjustment function. In a certain range, slight carbon deposition will also change the opening of the throttle, but the throttle will automatically adapt and adjust the fuel injection quantity, which has no effect on the use of the car. Exceeding the adjustment range of throttle valve, more carbon is deposited, and engine jitter and other faults occur. It needs cleaning at this time. Generally, the throttle should be cleaned when it is more than 30,000 kilometers.