Keyboard types extra letters

[Didier]

Hi,

I recently wanted to clean my MBP keyboard with some detergent, however I used a little too much, and it got behind the keys . I then turned the MacBook upside down and let it dry. There's no visible damage (it were only a few drops) and the machine turns on without a problem.
However, there are 4 keys that, when pressed, type another character besides their own character (for example pressing "b" gives "b[" ).
Does anybody have any experience with this? Is it something that can go away or something I can fix myself?

Thanks

(Ps: the problem persists across multiple accounts, but an external keyboard works fine)

 

[T5BRICK]

Sounds like liquid damage. You'll probably need to replace your keyboard.

 

[Didier]

Oh god, one of the most complicated repairs. I'm already afraid of the cost ...