Q: imac late 2012

Apple's guidelines and instructions can be found here:

http://support.apple.com/kb/HT3226

Regards.

I would also advise looking at HT3226 on the website. These particular iMac screens are made out of glass so a damp cloth should be fine. Avoid using anything with chemical though. Even though it's glass and not LCD you could still discolour the screen.

A

I think they've started giving them again. If you got one, use the small black microfiber cloth that came with the Mac. They are excellent.

First, use a wet QTip. But be careful it's not so wet it runs when you apply it to the screen. Squeeze a bit of the moisture out before using it, then wipe down a small area of the screen with the Qtip and clean and dry that section with the Apple supplied cloth. Don't let any of the water from the Qtip run near the edges of the screen.

Important: before you do any cleaning, blow away or very gently dust off (using the microfiber cloth) anything that might possibly scratch the screen. Be certain the cloth is free of any grit.

Yes.   The small black microfibre cloth was excellent.  So glad to learn they may be back again.   Otherwise any good quality microfibre cloth will do the same job.