Why do some buttons on the laptop keyboard not work, and some are pressed spontaneously?

Question

Iron

I don’t know what the problem is, because
1) there are no viruses
2) I cleaned the keyboard
3) they didn’t drop it, etc.

Answer 1

The keyboard was flooded.
As an option, something with a train due to an unsuccessful disassembly of the cleaning.

Answer 2

I advise you to replace it, it is not repairable.

Answer 3

It was like pouring sweet coffee :)