Do you eat at or around your computer? If so your computer keyboard is probably full of all sorts of muck and will be due for a good clean out.
For starters, turn your computer off, unplug the keyboard and turn it unside down giving it a gentle tap…you may be surprised to see exactly how much dust, crumbs, hair and other gunk falls out.
The next step is to grab a can of compressed air from a computer retailer or electronics store and spray along the rows between the keys, this will also remove a lot of the lose build up.
If your keyboard is still looking dirty after this there are further steps you can take which will require a little more time. Check out the video tutorial below.