iMac 27inch problem behind screen.
This has just happened on my iMac while i was using it. I have tried cleaning it, but it would appear to be behind the screen. It is now slowly fading away so it would seem to be condensation. Is it a common problem?
Its a mid-2010 27inch iMac which i bought brand new from Apple.
Applogies for the upside down photo, i couldnt find a way of getting it the right way up!
iMac, OS X El Capitan (10.11.1)