About a month ago, I bought an Apple Certified Refurbished 16GB WiFi-only iPad 2 (really because it was less than $300 from Apple and because there are times when I'd rather not put my $1000 iPad Air in harms way). Just today, I noticed that the screen has a bit of a ghosting issue. I'd look something up quickly in the Wikipedia app and it'd take the interface a minute or two to fully disappear from the screen once I switched to the Facebook app, and then another minute or two for that interface to disappear once I returned to the iOS 7 home screen. I have not noticed this degree of ghosting on my iPad Air, nor any of the other iOS devices that I own. Is this normal for the iPad 2? I still a month shy of my full two years of AppleCare+ coverage; is it worth taking it into the local genius bar? Or are they going to tell me that this is to spec?