Quoted from tilt-master:When shaved black residue is in the edges of the glass after you struggle to remove it, you know something isn’t quite right
This is what my October build GZ Pro was doing too. I was also getting little strands of shaved off plastic from the channels. The glass was very tight, but I was still able to remove it by hand. After putting the glass off and on a few dozen times, it feels closer to normal.