Don't look at this blog post. It's disgusting.
I mean, nature is fascinating and all, but the keyboard with which I'm writing the text you are currently reading is was not. For the first time since I bought it (May 2009) I actually went ahead and cleaned it. In hindsight I feel guilty for not having done so much, much sooner. The amount of dust, dirt, and hairs I was able to find hidden beneath its keys is just fucking insane.