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.
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***DISCLAIMER*** If you break your keyboard doing this it's not my fault.
Step 1: Cleaning Materials
1. Isopropyl Alcohol or smililar disinfectant cleaner
3. Vacuum Cleaner or Compressed Air
4. Lint-Free Cloth (microfiber works well)
5. Toothpick or similar fine point instrument
6. Flat screwdriver
*Optional: Disinfectant wipes are usually low lint and also work well
Alcohol works well because it's a good organic solvent, and it evaporates very quickly, so you're unlikely to do damage to your keyboard. Be careful though, it is flammable, as are most compressed gas dusters, so do this project away from potential ignition sources.
There are several reasons after some careful research that I decided not to attempt this method.
1) It's got a high but not 100% success rate, based on my google searches (NPR Story)
2) I don't want to risk my fancy logitech keyboard (not pictured) or school property (pictured) on anything that's not 100% keyboard safe.
3) Yes, you could probably clean the keys but I'm not confident they won't melt and don't want to babysit my dishwasher.
If you really like clean peripherals check out these dishwasher safe keyboards, TV remotes and mice at SealSheild.com
Step 2: Quick Clean / Initial Clean
1) Turn off computer and unplug your keyboard
**This is important since alcohol and compressed gas are flammable**
2) Use compressed air or vacuum to remove dirt particles
move from one side of the keyboard to the other to push the dirt out the end
3) Put a little isopropyl alcohol on your lint free cloth and wipe down the keys and case
Fold your cloth around a flat tip screwdriver to really get in between the keys
4) Dip a Qtip in isopropyl alcohol and gently clean inbetween the keys and around the edges of the keyboard
5) Use a toothpick to scrape out the crud from around the edges
Now, either plug it back in and get back to work, or, continue onto the deep clean for really filthy keyboards.
Step 3: Key Cleaning - Deep Clean Part 1
You could also write down the keys on a sheet of paper, but if you don't have a digital camera handy it's time to check ebay.
2) Remove the keys using the screwdriver like a pry bar (be gentle)
Start with a useless key, just in case things go awry, like the windows key =).
When removing the large keys be careful as many will have a sway bar (pictured) which can be tricky to get positioned properly when you reinstall the keys.
3) Clean each key individually using your cloth and isopropyl alcohol
Here's a tip: listen to an audio book or music, or have a movie/tv-show you've already seen and only half want to watch on to keep the right side of your brain from shutting down
Difficult Stains For some stains you'll need to amp up the cleaner a bit. For permanent marker, pencil, paint, or crayon (kids are insane) I recommend a aerosol product named "Goof Off", be careful using this as it may remove the key labels, spray a little on a cloth and then a inconspicuous test area before treating the affected area.
Step 4: Case Cleaning - Deep Clean Part 2
When you're done give the cord a quick wipe to, they're usually covered in dust.
When you're all finished, cleaning the case, you can pop the keys back into place. Be sure to pay attention to the sway bars and make sure they get seated correctly (See step 3).
Step 5: Maintenance Cycle + Results
How clean is this really??? sure it looks better, but lets repeat the tests. Much, much cleaner, of course it won't stay that way unless it gets cleaned regularly.
Keeping It Clean:
How often should you clean your keyboard? If you've got a new keyboard or a like new keyboard after doing the deep clean you should wipe it down with an atiseptic cloth weekly or even more frequently depending on the user load (almost daily for a 1st grade class). Vacuum/Blow out the keys to remove dirt particles at the same time and repeat the deep clean process again when things look like they did in the intro (which hopefully they never will).
Thanks for reading! If you liked this Instructable please vote for it in the Burning Questions 7 Contest!