Does the "Fingerprint-resistant oleophobic coating" eventually ware off ? I'm currently using the otterbox for my iPad ,I prefer to use it the organic way with nothing protecting the screen , it takes away from my preferable viewing. I hate seeing dirty iPads or Laptops that are full of spit food and who knows what else ! Or you see people in public like the apple store genius bar with dirty stuff that's disgusting. I try and keep my stuff clean .