What is the best way to prevent keyboard marks?

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...

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.

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 the ShaggyMax protector on every laptop in the last 9 years. No marks / great resell value!

http://www.shaggymax.com/laptop-screen-p...

I just found out today, after replacing my screen, that the marks are caused by the oil and acids from your fingers, and not by the pressure from the keys. The marks are damage to the anti-glare coating, and, as such, are not actual stains that you can clean off without removing the coating altogether, which is an option. SO, you need to clean your hands and keyboard regularly with isopropyl alcohol. There’s kind of a funky solution, if your screen is really bad and you’re feeling adventurous. You can remove the coating altogether with a soft cloth, Listerine, and some time. Sounds ridiculous, but I’ve done it myself. Then, if you can’t stand the glare, you can apply a third party screen protector like the ones you put on your phone.

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

I never close the lid.

Please check the following video worth watching showing how to take care of your Mac book Pro and also keeping it dust free.

http://tinyurl.com/mekv7vv