I noticed yesterday that my keyboard was filthy.

The sun was shining in just right and it looked bad. I've only had the computer for 7 years or so? There is only so much you can clean without taking things apart.

I disassembled the keyboard and cleaned the keys and board itself. Google "how to clean a keyboard" and you will find some articles about it. Just be careful with the keys so you don't break one getting it off or lose some while cleaning.

Tip - Take a picture before disassembling. Put that pic up on the screen so you have a reference.