How to fix keyboard damage?

My Macbook Pro had a soda spilled on it about 6 months ago. At first I thought I had it cleaned up quickly enough that there wasn't any damage. However, the right half of the keyboard seems to be developing "sticky" keys that is getting worse over time. Specifically, the space bar, right command key, i,o,p,j,k, and l keys are particularly troublesome. Is there any fix I can do at home without having to take it to Apple? The keyboard itself doesn't seem to be user replaceable from what I can see. Thanks.