Although we're guessing most of the gunk and grime that lands in your keyboard is from snacking while working, you can still keep the dust bunnies away while you're not around. DIY site Instructables details how to keep that new-keyboard feel.
This DIY project is super easy and super inexpensive here's what creator and Instructables user sbgstudios has to say about the project:
I work from home a week at a time. I recently got a new keyboard at work and loved the "newness" so much i wanted to keep it that way. So I thought of creating a cover for it to keep out the dust while I was away. Oh, and I did not want to spend $$ on it. Call me cheap...
This Instructable could not be easier and costs next to nothing to make. Most of the materials you have in your desk drawer already.
All you'll need is some paper, scissors, tape and a few writing utensils, and that's it. Hit up Instructables for the full tutorial to make your own.
Easy Keyboard Dust Cover [Instructables]