Kinda funny, but mine’s just in the last week developed a slightly brighter kind of blotch about an inch or so above the touch ID button. It’s oblong and maybe about the size and shape of a good sized thumb print. It’s virtually undetectable at the moment, unless the screen is full-on bright and white, whereupon it sorta shows up when I’m scrolling and the text moves over it. It’s only mildly distracting at the moment, and I hope it doesn’t worsen. Seeing as how it’s just passed its one year anniversary, it’d be a crappy time for it to fail.