What about washing the throttle every day?

There are three reasons for the high idle speed after cleaning the throttle and idle valve. (1): Because the throttle body has not been cleaned and maintained for a long time relative to the power stack, a large amount of carbon deposits at the throttle make the gap between the throttle and the throttle body narrow, and the engine computer changes the throttle opening through the learning process, so the idle speed will be high when the computer is still in a changing position after cleaning the throttle. The solution is to clear the original records of the engine computer, and the fault of high idle speed can be solved. (2) Due to carbon deposition, the throttle body may be worn, and the gap between the throttle body and the throttle body will increase, resulting in high idle speed. The only solution is to replace the throttle body. (3) Or because of carbon deposition, you may not have thoroughly cleaned the throttle valve and the idle valve, resulting in the throttle shaft and the idle valve shaft being stuck and the idle speed being high. The specific situation needs specific analysis. Judging from your message, it should be these conditions that lead to high idle speed. It is recommended that you go to a professional "4s" repair shop for inspection, so as to make an accurate fault judgment for your car.