Help with a laptop, urgently!

I borrowed my housemate's laptop, and acidentally spilt a drink on a bit of the keyboard. Now the entire keyboard isn't typing normally (for example, the 'F' will produce about 5 characters).

How do I go about fixing this?
Please help
Thanks

I didn't find the right solution from the internet.

References:
http://www.techist.com/forums/f43/271985/

Animated Demonstration Examples