Q: I've let my keyboard keys get grimy. They are disgusting. I don't think it's possible to follow Apple's recommendation (use a lint-free cloth lightly moistened with water) and get them clean.

If water won't cut it, use a mild abrasive free cleaning product such as a window cleaner. Spray a small amount on the cleaning cloth - do not spray onto the computer and don't let the cloth become saturated.

Too much moisture and you will wash that grime into your keyboard. You could use a dry toothbrush to brush away as much grime as possible, trying not to depress the keys with the bristles. Then moisten a lintfree cloth (not a paper towel) and wipe the keyboard but don't rub real hard as you could force stuff under the metal. Repeat until clean. They make clear covers for keyboards if you are working in a environment that isn't friendly.