Essentially, what's happening is that while OEM iPhone screens contain a layer of coating designed to offer resistance against both the static electricity generated by one's fingers, and the oils / sweat produced by fingers which lead to fingerprints, condensation etc on screens, the third party ones seem to be severely lacking in this. That's why often this problem will take a while to appear after a repair - it starts happening once you get fingerprints, oils, or just condensation from these materials or your breath on the screen, and will temporarily fix itself if the screen has been wiped / unused for a while and therefore dried out.
+
+
+
+
Basically to sum all this up is Oil, dirt pile up, etc. will collect on your screen. Therefore your dirty screen is the problem for these “ghost touches” because there’s no protective layer on the screen.
( FYI, I copy and pasted the this from a post on Reddit.)
Essentially, what's happening is that while OEM iPhone screens contain a layer of coating designed to offer resistance against both the static electricity generated by one's fingers, and the oils / sweat produced by fingers which lead to fingerprints, condensation etc on screens, the third party ones seem to be severely lacking in this. That's why often this problem will take a while to appear after a repair - it starts happening once you get fingerprints, oils, or just condensation from these materials or your breath on the screen, and will temporarily fix itself if the screen has been wiped / unused for a while and therefore dried out.
( FYI, I copy and pasted the this from a post on Reddit.)