What are the consequences of not cleaning the throttle for a long time?

Consequence of not cleaning the accelerator for a long time: 1, resulting in increased fuel consumption. 2. Increased carbon deposition. 3. The vehicle cannot be started due to long-term idle jitter or abnormal fluctuation. The cleaning steps of the throttle valve are as follows: 1. Turn off the ignition switch and remove the negative electrode of the battery. 2. Remove the throttle pipe, air inlet hose and the screw for fixing the throttle. 3. Clean the throttle with carburetor cleaner and wipe it with cotton thread. 4. After cleaning, install the throttle in the order of removing the throttle, and try to see if the air intake of the cleaned throttle is unobstructed.