Another possibility; look for an optical cleaning cloth (often found at opticians or camera shops) of the necessary size (or trim accordingly). Use this between the keyboard and screen (nice and thin) and doubles as ...a cleaning cloth. Much cheaper than some of the commercial options.

I use a fine piece of leather, which also can be used as a mouse pad on rough/reflective surfaces.

Get a screen protector from OWC. Been using them for years and they work flawlessly.

http://eshop.macsales.com/item/Other%20W...

It seems mine collects a lot of dust so I keep a microfiber cloth (think Billy Mays) over the keyboard and when I'm ready to use the Mac I dust everything off and as a bonus, if I wet it a tiny bit I can even clean of my grubby fingerprints. This is also the least expansive of the tips

Check if the little plastic pads on each top side of the screen are still here and not cut. They serve to keep a small distance when the screen is closed. You can increase distance with added thick adhesive tape.You can try to add two thin little pads on bottom of screen too. Check for the needed thickness with the screen closed to keep the hook grabbed on bottom part.

Eventually try to adjust the hinge height to increase distance to keyboard.

And never put big objects on screen size when you carry the Mac in backpack or use a sheet of hard material (metal, epoxy,..) as separator to avoid any pressure on the top cover.

I have used for years a Kensington Micro fiber cloth - It looks like gray suede, exactly the right size to protect the entire screen... I carry my 15 everywhere and haven't treated it particularly gently, I don't think. The screen looks brand new.

I like Mareware http://www.marware.com/products/MacBook_... it includes a two-in-one microfiber keyboard cover & cleaning cloth. a Soft PVC leather hand rest, (provides protection to the top case sides that scratch/discolor), and a clear film track pad cover.

There's also a Silicone version of the hand rest and track pad protectioni, with cleaning cloth for keyboard and screen.

N.

Clean your hands before you use the keyboard. Sure it can be a bit of a pain, but it will keep your keyboard clean. To make this a bit easier you keep a can of hand sanitizer next to your computer on your desk.

Any sort of skin/keyboard cover which cover's should work, but i'd advise a screen protector as well, as the keyboard cover itself could leave a mark