MacBook. Why did the left mouse/touchpad button stop being pressed?

Question

macbook

He spilled a drop of water on the touchpad, it flowed inside and from that moment he began to obey badly. The strangest thing is that the left mouse button stopped working. It does not work even if an external mouse is connected.
Who knows what could be the reason? The laptop was disassembled, there are no divorces or damage. I wiped it with a cloth, started it - nothing has changed.
I tried to run the laptop without a touchpad, it hangs at system startup.

Answer 1

There was a similar problem with touch id on an iPhone after water, an ultrasonic bath and "cleaning" of contacts helped, there was a little oxidation. Perhaps this is the problem.