Just FYI...I've had every iPhone since the 4, have had screen protectors only on two, rest are native, keep them in my front blue jean pocket, clean them at times (DO have microfiber & usually use just damp, sometimes with safe eyeglasses cleaner), but, typically I have only gotten smears on my screen. But, with the X, it's been REALLY dusty, like there's a static charge or something. Wondering on the dust inside the camera area, if it got sucked in from elsewhere inside (not sure there's an opening to suck dust in via...).