Keyboard of MacBook Pro doesn't work anymore

Hello to everybody!
I hope, that somebody out there can help me as fast as possible.
I spread a coffee over my 1-year old MacBook Pro keyboard and as fast as I could I turned it head down, so that the coffee could come out of the keyboard. I cleaned the keyboard and tried it out, if everything still works... in the begining it worked, but then some letters begun to not work anymore or I couldn't write some big letters anymore... so I desided to put my extern keyboard from an other computer on my MacBook Pro so I could at least write with this extern keyboard. But now as I wanted to put this extern keyboard away my MacBook Pro keyboard doesn't work anymore at all. Now I have the question, if I need to give in somewhere an order on my laptop that I want to use again the laptopkeyboard instead of the extern-one? The problem is, that normaly with windows I was used to just put the extern keyboard away and my computer realized on his own that it needs to use the own keyboard again, but with the MacBook Pro this doesn't work, so I'm a little bit confused and don't know, if my keyboard is now totaly damaged or if I just need some computer-language-order to tell my computer to use the normal keyboard again.
Please HELP me!!!
With best regards
Kati

i'm not suggesting it also, but it could work .
Btw, i will take off the keyboard from the MBP, disconnect the conector, so you can really give him a bath and shake it.
and, as it is dead, what do you have to loose ?
to take off a keyboard is quite easy, google will give you some tutorials on that.
another , may be the best method, is to clean it really, but it's like a pain in the a.s to dissassemble it.
I have done that on Apple Pro keyboard and apple Imac G3 rev 1 keyboard, and they are working as usual now, but it took me some hours, with a real good tutorial from sterpin.net(in french, useless for your topic)
so, a good bath in distillate water, with a lot of shaking, you can also press on keyboard keys, shake it, and so on, and 2 days under a august sun..
distillate is not expensive, and I will suggest it better than alcool, as it will not damage any of others components. Have in mind that it really need to be dry, so, 2 days are not so much, and, when the keyboard is under the sun , shake it too from time to time, just to be sure that some water can't make a "water bubble" in a place.
and give us some news.

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