What happens when the cleaning agent pipe is sucked into the intake pipe when the car cleans the accelerator?

When cleaning the throttle valve, if you are not careful, it is easy to spray the pipeline of cleaning agent into the intake manifold. If you get in, you'd better take it out, but it's not too much trouble to remove the intake manifold.

But if you don't take it, it may just be stuck on the intake valve. In this case, due to the long pipeline and the fast opening and closing speed of the valve, it is impossible to enter the cylinder at one time (it will burn if it enters), and it will stick to the valve, which may cause the phenomenon of unstable idle speed.