I try to clean my display as little as possible. Whenever I do it, I generally use just water. On rare occasions, I've used glass cleaner because my kids put their fingers on the display and got it all smudged up.
So far that's worked well for me.
I will have to take down any approaching children. I fear the dreaded fingernail from a work colleague, whipped out and stabbed at the screen without a moments notice.
Ok, so far I have for prevention:
1) a micro fibre cloth to sit between the screen and the keyboard
2) remove dust molecules with a soft camel hair brush (Egyptian is best)
3) use a different micro fibre cloth to clean in small soft circular motions while gently singing 'Clean the Day Away' (but careful that the key I choose does not vibrate the coating)
4) use water, but not water from a hard water area, preferably distilled water originating from the Tara in Montenegro
5) test the acidity in my hand sweat to make sure I'm Macbook compatible
All this while on the lookout for exploding pixels (The 'bug crawled out of my screen' was a favourite thread to read). If this does happen, wait until there are 4 before Apple will do anything.
And finally, if I do have to send it back with coating issues- don't say it's the coating as they will blame customer use despite the above- but say it is a manufacturing glue fault.
Apple's mission to spread OCD to masses is working well. I wonder if they fund a CBT scheme somewhere and are preparing customers? The iOCD program.