Ok after I took out the battery and found absolutely no traces of milk, I cleaned some areas with contact cleaner, and put it all together again, and daringly (probably shouldn't have), turned it on. And it's working... To make sure nothing was wrong or had changed I used it for a couple of hours and everything seemed to be working perfectly fine. The time and date needed reseting for some reason but that was it. [Edit] Of course the keyboard backlighting is screwed up...
Since my warranty is destroyed anyway, I'm going to take it to apple tomorrow just to make sure it's in good condition, and if I should expect any issues in the future, and check out any repairs I can get.
I couldn't find distilled/deionized water anywhere btw, it's impossible to find.
Thank you everyone for all the awesome help, I don't actually want to thank too soon incase anything does go wrong like tomorrow, and I have to come running back here. But thanks anyway.
And heck yeah, I'll be moving out next month for sure.