Why can the keyboard not work properly after cleaning the laptop?

Question

Iron

Who will tell you why the keyboard may not work well after cleaning the laptop? (poorly responds to keystrokes - that is, you press the key nothing happens, you press a little harder and it starts working, or you press the key 1n time and the character that corresponds to it is printed with repetition) the cable seems to be connected normally, this problem is not with everyone keys but only with a part.

Answer 1

The answer probably knows, only the one who cleaned))

Answer 2

Alternatively, there could be garbage in the keyboard. You pulled it out, actively turned it over - the debris moved, blocked the mechanics of the buttons. You can try to pull it out and shake it...