some of my keys were playing up after water got into my macbook pro too (although i stupidly sprayed windex on it to clean it.. yep dumb!). anyway i went to apple the following day and they said a new top case was about 400 and was the only thing that could solve it. lucky for me i'm broke and said i would think about it because the next day everything suddenly worked fine. it obviously took just a bit of time for it to fully dry in there. even after i opened the bottom up and held a hair drier up to it for a while. so... make sure if you want to get it repaired you at least wait a few days in case it happens to come back to life. i would even give it a week if you can. you don't want to pay a load of money for nothing!