Any nearer to ghost touching fix?

Ive seen all types of advice and assumptions given for fixing ghost touching on replacement screens but have never had anything work for me.

Is it pure and simply down to a duff screen? I test all my screens before they go on a customers phone and its always typical the issue happens when its left my repair shop.

If its down to poor screens i can put a line underneath it (faulty flex for example) and be done with it, try a new supplier. But if its something im doing, not grounding properly or removing battery first for example i would like to catch the issue before the screen gets installed.