oil and vinegar over the keyboard

Hi.

I´ve a little problem. 2 days ago I threw my salad over the keyboard of my macbook 13 inch unibody late 2009. It was on while it happened.

I tried to clean it (I just took off the letters and so on), but when I try to turn it on it just comes the white screen with the apple logo. It loads for a few seconds and than it turns down.

Is there any possibility to repair it? what can I do? Unfortunately it was oil and vinegar...should I wait a couple a days or is it already late to do anything?

Thanks in advance.