Cleaned my keyboard, now it doesn't work

I cleaned my Macbook Pro (mid 2009) recently. I use a product called iKlear and have done for a few years. I cleaned it using pretty much the same method as I always have done, but used a few more squirts of the solution than usual on my keyboard because it was pretty dirty. When I turned the Macbook back on, the keyboard was acting erratically.

I use the word erratic because there doesn't seem to be much logic to how it works now. Here's some examples...

If I press the 'R' key, it will lock-on and simply keep typing the character. Nothing happens at all if I press 'K'. And if I press 'Z', the volume somehow decreases.

There are a few other examples, but you get this gist. My first thought was water damage, so when it happened I turned the laptop off and let it dry out. I've been away for a week since then and assumed it would be working by now, but the same problems still persist.

Is there anything I can try at home before taking it in to be repaired?

Thanks