If you want to know how to clean your computer keyboard in 3 simple steps, you should watch this video. To clean your computer keyboard, you will need Hydrogen peroxide, soap dish, spoon, cotton buds, and a small bowl. Just follow these 3 simple steps: Put 1 part soap dish and 1 part Hydrogen peroxide into a small bowl depending on how much you need. Mix it well with a spoon. Dip the tip of the cotton bud into the mixture and scrub it against your dirty computer keyboard. Remember to change the cotton bud once it became dirty.