Can I clean the internal injection directly without removing the throttle?

The owner intends to spray the cleaning agent directly on the long-term unwashed throttle. Is this ok? Cleaning agent can be sprayed directly into the throttle valve without removing it. Although this method is simple to operate, it is easy to cause the result that the throttle valve is not cleaned. After all, it is directly sprayed into the throttle, and some dead ends can't be sprayed out. Unlike the disassembled throttle, it can take care of all aspects. Therefore, it is suggested not to be convenient, thinking that it can be cleaned by spraying directly into the throttle, and stains will accumulate in the position where they are not sprayed and then break down, or the throttle should be cleaned. Throttle plays an important role in automobile. The use of throttle can make full use of fuel, reduce emission pollution and protect the environment. Remember that cleaning the throttle valve regularly can prolong its service life. Failure to clean the throttle for a long time will have adverse consequences and affect the safe use of the car. It is not recommended to spray directly without removing the throttle.