Ok so dis it today.
Redid all fixes from here. I found out that the sound was there even without glass panel on. I removed it completely.
So I started playing around and found out what was causing the cracking sound.
It's this plastic part.
Put some screws between that and the metal part below it. Put some loctite blue on it and placed 5mm foam on top of that.
This is now fixed.
See pics of the cracking sound part.

Redid all fixes from here. I found out that the sound was there even without glass panel on. I removed it completely.
So I started playing around and found out what was causing the cracking sound.
It's this plastic part.
Put some screws between that and the metal part below it. Put some loctite blue on it and placed 5mm foam on top of that.
This is now fixed.
See pics of the cracking sound part.
