I recently bought a used computer and would like to clean the keyboard.?

There is an electronics aerosal cleaner that you can get that works great. It won't hurt anything, so just spray the heck out of it. Rubbing alcohol leaves an oil residue that isn't good for electronics, unless mabye it's denatured. I'm not sure if that's good either - so therefore you should get the electronics spray cleaner. I've got a friend that plays a guitar and uses it regularly on is wowwow and volume. Hope this helps ya!

Rub some lime onto a cloth, and start scrubbing away.

As for the expected dust underneath the keyboard, flip it upside down and give it a good shakedown.

You can get special wipes but they aren't cheap. You could use babywipes instead but make sure you disconnect the keyboard first.

A simple non abrasive soap mixture with and old toothbrush can do the job pretty well

you can clean your key board with rubbing alcohol.

I use pipe cleaners and rubbing alcohol.

I always use cotton wool sticks and dip them in the ammonia.