Which effect is better, cleaning in the 4s shop or cleaning the throttle outside?

When you clean the throttle, you must pay attention to the cleaning agent used by the 4S shop for you. Special cleaning agent is more reliable. It is difficult to clean the throttle at one time. If you use an unreliable cleaning agent, you might as well not wash it. You must use a special throttle cleaner. The special cleaning agent for throttle valve takes into account the damage caused by cleaning throttle valve, so this cleaning agent will have the functions of cleaning, lubrication, protection, carbon removal, rust prevention and so on.