Earlier today, i knocked over a huge cup of coffee, standing on my table, straight down into my keyboard...
I immediately pulled the usb plug, and was very annoyed. When I turned the keyboard upside down coffee was poring out of it!!!
I considered it lost, but decided to try and save it. I couldn't figure out how to dismantle it, so I put it in the kitchen sink, and flushed it with hot water for about 5 min!
After that I left it upside down on a heater/radiator. After a couple of hours it was still dead, but now, almost 12 hours later, it works perfectly!!! 
It's not a method for cleaning the keyboard (though my keys are very clean now), and I can't guarantee that it'll work, but if you ever poor something into a keyboard by mistake, it's definitely worth a try
I considered it lost, but decided to try and save it. I couldn't figure out how to dismantle it, so I put it in the kitchen sink, and flushed it with hot water for about 5 min!
It's not a method for cleaning the keyboard (though my keys are very clean now), and I can't guarantee that it'll work, but if you ever poor something into a keyboard by mistake, it's definitely worth a try