I will just keep it.That sucks. So what are you going to do?
I mean it is only in the corner of the case and isn't noticeable at all especially since my iPhone is White. You only can the defect when you remove the phone from the case and you have the case close up to to your eyes.
Obviously, this shouldn't be happening as the case is only a couple of days old but it seems the frost wearing off after removing the phone from the case seems to be a common issue. I think Tee mentioned it as well in one of his videos as well.