Our test subject, in this case, will be a Mac keyboard from a first grade classroom. Since the Mac keyboards are nice and white it's easy to see how filthy those little fingers are. The PC keyboard cleaning instructions are identical, but the results are not as photogenic! To give you an idea of the dirt beneath the dirt, I took this a step further.
As a tangent I decided (for a future instructable on culturing bacteria) to put the toliet vs. keyboard claim to the test. I swiped the keyboard, and a toilet seat, and cultured the bacteria on Agar for 3 days at 95F before comparing the bacterial growth, you can see the results below.
Good, lets get to cleaning. Just to demonstrate the effectiveness I'll repeat our cleanliness test in step 6.
If you enjoy this instructable please vote for it in burning questions round 7! Thanks.
***DISCLAIMER*** If you break your keyboard doing this it's not my fault.