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You know what I find kind of annoying, the outer aluminum case of the Air attracts a lot of dust and such, especially the top when the laptops been closed for a day.

I also dislike how the palm rest area gets this white-ish stain from natural perspiration while working/typing on the laptop that I have to constantly wipe off.

=T

Anyway, like others, I use a micro fiber cloth with a tab of water.

Why not consider a case for the palm rest (like this one: http://twelvesouth.com/products/surfacepad_air/ )?
 
for the body I use AutoGlym Super Resin Polish, then Dodo Juice Supernatural Wax

for the screen I use Autoglym Glass Cleaner, then RainX to make it sparkle ;)

Mid-2011 that looks almost brand new lol
 
On the chassis, simply 70% rubbing alcohol and water in a 50/50 solution. For the screen just water and a quality microfiber cloth. I use warm water if the dirt on the screen is stubborn. Been doing it for 20 years on all my portables (had 27 of them - 16 of them Macs) and so far no problems. :)

Amen to that! That's what I do and it makes the Mac look brand new!
 
Keyboard - never have cleaned it - use a keyboard cover. Screen, Griot's glass cleaner sparingly with microfiber. Once a year or so. Cover/case, same as Screen. Keep my MacBooks in BookBooks so they almost never need any sort of cleaning.
 
Damp microfiber cloth, plus some special spray for the screen from a tech shop.
 
for the body I use AutoGlym Super Resin Polish, then Dodo Juice Supernatural Wax

for the screen I use Autoglym Glass Cleaner, then RainX to make it sparkle ;)

Mid-2011 that looks almost brand new lol

You forgot the part where you pressure wash it first.
 
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