Since you didn't give us the make and model of the computer, and you stated that you "Took the keyboard out", it's only a guess that you're using a laptop.. If it is a laptop, the spill could have dribbled down into other parts of the computer, maybe the motherboard, or very possibly the sound cable from the keyboard to the sound card. Heck, downloading and installing an updated sound driver might rectify any glitches that were caused by the short.

Or, if it's an external sound cable, try replacing it. If it's an internal cable, you may need a repair person to take a look at the internal parts for damage, such as the motherboard, or the sound card itself.

Hope this helps.

Grif