I've noticed on my iPhone 5, and pretty much all iOS devices I've owned, that the home button becomes noticeably recessed after extended use. This is in contrast to when the devices are new, and the button is almost always flush with the glass of the display. Small gripe I know, but I am curious if the new home button design on the 5s has the same issue, or if it is more durable than on previous iOS devices. So, for long-time 5s owners, have you noticed any recession/degradation in the home button?