My turn to report back...
Went to the Genius and he tried like 4 or 5 screw drivers and realized they weren't fitting... Then he said he would take it to the back and adjust it.
He came back few minutes later and said that he tried to adjust it, and couldn't hear anything. He also said I had 3 days (till the 11th) to take it back and exchange if it was still bothering me.
I did test it out, and it seems better than before I took it in.
The thing is it happens randomly at times when I am using it in my bed and just move around. I haven't tested it in that scenario yet, but I will use it today and tomorrow before taking it back. I really don't want to because I had the hinge problem before, and this one is perfect when it comes to everything else. If I can't hear it tonight, it's a keeper!
Edit: been using it for a few hours in bed tonight and the creaking is still there. Not sure if the Genius actually tightened it because to be honest it looked like he didnt have the right torx driver. I will probably take it in on Wed again to make sure... I really don't want to change it, but it still bothers me to hear the little crack noise once in a while.