I've noticed a few hairline scratches on my 6s plus. Very tough to tell if the phone arrived this way or if has happened from normal use. Either way, I do recall iPhone 6 reports that the screen scratches rather easily. Short of exchanging the phone, are there methods to remove hairline scratches? When I say hairline scratch, I am referring to a scratch that is only visible at certain angles and has no depth (can't fill it with your fingernail).