Cleaning a MacBook Pro keyboard that's been covered in juice

My lovely son spilled apple juice on my laptop keyboard.

It works, but it feels like it has grit under the keys and sticks a bit.

How do I clean it out?

I remember old keyboards could be just banged hard against the desk... I presume thats a bad idea though...

It's a macbook pro 15 inch laptop

You can actually remove the keys, clean them and then replace them again.

Follow this link to see how it's done: http://www.youtube.com/watch?v=jSpPlMdGvVI

The problem with liquid damage is that although the laptop may work fine now, if the juice has got onto the Logic Board, it can cause corrosion over time, which will more than likely cause issues.

However, I do hope this is not the case! Good luck!