Like a moron I've spilled beverages on my keyboards multiple times, and they were all salvageable. The trick is to disconnect the power source immediately, as this will multiply the corrosion rate exponentially. You immediately unplug it and tilt it to it's side and let any liquid run off. Then take off the keycaps and try to soak up any residual moisture. Then put it under a fan to help blow off any moisture and dry it. If you are fortunate it did not get in the switches. Unfortunately, the sticky stabilizers are impossible to clean without taking them apart and cleaning with soap and water, and then relubricating.
If you are getting multiple keypresses it's possible that A. there is still resisdual moisture. B. There is still a lot of dried crap stuck to the PCB. or C. It is fubar. I'm voting A and B most likely. Buying the materials to fix it may cost 1/2 to 3/4 of what you paid for the board. As somebody suggested you can check the artisan links for somebody that can do this for you. If you are feeling brave you can attempt to do this yourself after watching a few youtube videos and doing some research.
I elected to fix it myself. There is a learning curve and I actually burned the pcb with a cheap overheating soldering iron, so you don't want to go too cheap with the tools. The other boards I was successful with and was able to make modifications I wanted while I had it deassembled. If you don't want to do all this you may want to buy a new board and be done with it, or get a used one on ebay as you may save 30% or so.
