how can i clean the white keys on my keyboard

I just use a really wrung out damp dish cloth or wash cloth with only a hint of dish soap left in the rag, to minimise sudsing, to clean my Apple keyboards.

Turn off your Mac or unplug your keyboard before cleaning.

Been using this method for 20 years and always cleans the whole keyboard and keys very well.

Gets off all of the finger oils, grease and grime.

I just cleaned mine keyboard again last week. As I've mentioned before in this thread I typically use a paper towel slightly damp with windex. It's pretty similar to what MichelPM mentions. My company makes the Magic Eraser material, it's pretty interesting how popular it has become. My only concern about using it would be the particulate matter that using it would generate. That could cause keys to stick or reduce travel.

How to clean Apple products: http://support.apple.com/kb/HT3226

And just another little hint is to hold the keyboard upside downwhile doing anything with a damp anything to reduce the chances of any liquid running down the sides of the keys.

Very good advice Iain!

And so is this: unplug it first! 🙂

Disconnect keyboard.

Cotton Bud, lightly dampened (but not wet) with white vinegar.

I use a white vinyl eraser to clean the keys and canned air to blow off the eraser grunge. Turn off the keyboard first.

I just tried the Mr Clean Magic Sponge. I dampened it just enough to activate it, rung it out and gently stroked it across the keyboard and it sucked the dirt right up. Keyboard looks like new.

I Used rubbing alcohol, which is a great solvent, a q-tip and micro fiber cloth. Worked like a charm.

I use a Mr. Clean Magic Eraser and it works fast and really well.