It is normal that I see ripples/waves like lines on the lock screen "touch ID or enter passcode" "search" and when on the screen when I receive a text message?
I realized recently that there are some ripples/waves like forms on the screen of my iphone 6 plus on the lock screen (grayish background). From what I remember, there is no water damages to the phone. Does someone know what causes this? I have an image attached below. We can clearly see that some spots are brighter than others
iPhone 6 Plus, iOS 9.2