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iKlear works wonders for me. Get the big package; it includes an antimicrobial cloth that can be used on the keyboard and trackpad.
 
Don't spray the screen directly. Spray a corner of the cloth, then apply the cloth to the screen.
 
i used to use water cause its what apple recommended...
but i decided to take a shot at iKlear bottle, WOW, amazing
i just got the bottle and use my own microfiber cloth.
 
if you go to the apple store you will see they have alot of iklear bottles that the "geniuses" use.
 
I used to use iKlear but found that it left smears on the screen that I couldn't get rid of.

Now I use a microfibre lens cloth (purchased from an online camera shop) and distilled water.

Mind you, with a glass screen I'm sure you don't need to be nearly as careful as you did with the older screens.
 
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