After cleaning the throttle, the idle speed will not drop.

Of course, it has something to do with the idle speed control valve, which is directly related to the idle speed and can be adjusted by adjusting the screw. The throttle sensor is used to detect the throttle opening. Step on the gas pedal twice and you will come down. I think you should check whether the valve is stuck first. Make sure there is nothing wrong with the valve before checking other handles.