Chosen Solution
2 days ago, I had a full glass of tap water spill onto keyboard, I removed motherboard instantly and used IPA (%100) with a brush clean it thoroughly. I also splashed IPA onto the keyboard and lightly scrubbed the keys and touch board thoroughly to force IPA through the keys. I repeated this a few times. letting it dry for 8 hrs. After re-installing, keyboard keys are not responding as before and sometimes doubling up. Should I remove keyboard and IPA clean all soldered components immediately? I followed the online Electronics repair school. this guy is the best and learn’t a lot from him. he uses zippo petrol to clean parts. I wonder is that better to use instead of IPA. He also applies liquid flux after scrubbing with petrol and heats the board and scrubs again. I wonder should I do that. Here’s the link https://youtu.be/oRFmhLy1t5Y
To start off you used the correct cleaner isopropyl alcohol is a good choice when you’ve caught it early. Did you quickly disconnected the battery? As thats one of the first things I would have done and leave it disconnected until I was sure all of the water and cleaner was removed from the system. I’ve never has success in cleaning liquid out of the any of Butterfly keyboards. I will only replace them by replacing the full uppercase assembly, which is likely what you’ll need to do here. But, you have a second issue which is the TouchID button. I’m not sure if you have damaged it from the liquid spill or the connection to the logic board is having a problem. Keep in mind this button is married to your logic board so if its damaged in any way you can’t replace it! Your only hope is to bring it to an Apple Store and let them do there magic. But, as we know Apple won’t work on liquid damaged systems even if there is no signs of corrosion or spillage visible. Its the markers that they go by. So you are in a kettle of fish here. I don’t have an answer to get you all the way there. But, it might be a start.
Did you put the keyboard connecter in place properly?