water related keyboard problems :-(

So, [this](http://www.reddit.com/r/thinkpad/comments/2591xx/just_got_home_after_a_storm_and_the_ceiling/) happened yesterday.

I dried it out with rice and placing it right next to a dehumidifier.

Now, it boots fine, but the C,D,E,3 and F2,F3,F4 keys no longer work. It is still under warranty for another few months, but I see that a new keyboard from ebay is only $25, which is probably cheaper and faster than sending it to lenovo.

Would it be worth a try taking out the keyboard and flushing it with soap+water? Does "a block of keys not working" point to a problem in a particular component?