A little off topic, but I was wondering what kind of "wear and tear" occurs on a phone at the molecular level? I imagine a phone with a "pin" verification will

A little off topic, but I was wondering what kind of "wear and tear" occurs on a phone at the molecular level? I imagine a phone with a "pin" verification will be tapped fairly regularly in certain places on the screen (especially if the user never changed their pin). Also wonder if any of that "wear and tear" would show up in the circuits that detect taps. Again, if only specific places on the screen are tapped for the pin (never changed) it may leave enough evidence somewhere somehow at the molecular level. Anyone here with knowledge in this area that could debunk or validate this concept?