cleaning the screen?

I use this..works well on anything I have used it on.

http://eshop.macsales.com/item/Klear Screen/KS2/

 

This stuff is excellent http://www.play.com/Electronics/Electronics/4-/8922001/AM-80104-Screen-Cleaner-Anti-run-Gel-200ml/Product.html.

Obviously you'll have to find a dealer near you. It's quite thick so doesn't run, spray it onto the cloth and then clean your screen. I use it on a rMBP and my plasma television. One bottle lasts years.

 

A damp, slightly soapy cloth has always worked for me. Followed up, if required, with any generic glass cleaner. No damage in 7 years for me cleaning the screen like this.

 

I must admit that I have, from time to time, used glass stovetop polish very sparingly to get rid of every last streak and get a sleek almost waxed car finish. That said, It is altogether possible that some of the coating might have been effected, but I see no signs of that. Keep in mind I used just a wee bit on a damp cloth and polished it off. I could never get 100% streak free with normal methods.

 

I use a somewhat damp soft cloth then dey it with a microfiber cloth. Same for all my monitors and the TV.
In case it's not enough, you can use a little window cleaner.

 

Microfibre cloth for the win.

I will just add that for the errant fingerprint or smudge, I use a soft cotton terry cloth, dampened with distilled water . . . . then cleanup with the microfibre cloth.