How do I get my spacebar to start working again?

So, I spilled a small amount of water on my ~ 2 year old MacBook Pro. I cleaned up the water, but the keyboard slowly stopped working after 5-10 minutes. It would repeatedly type G and T over and over again. Then, the keyboard just stopped working altogether. I turned it off, took the battery out and let it sit for 36 hours. Now, everything on the keyboard works again except for the spacebar -- any suggestions how to fix it?

(I realize I still may need to buy a whole new keyboard anyway... but thought I'd ask). Thanks!