First of all excuse my for my bad English.
For more than a year i have a very a annoying problem

It started when i had left my car under the hot sun (>38 degree Celcius) for more than 2 hours of course with sun protection on the dashboard.
So my problem is that the roof lining is making a creek/rattle in the area that its attached with the metal frame of the sunroof (inside the car).
This creek can also be heard even if i tap my finger on it.
It gives me the feeling that in someway the roof lining has been detached.
I will try to post an image during the afternoon of the excact point of my problem.
Has anyone of you encounter any similar problem?
Any advise of how to remove the roof lining in order to fix the problem because i dont want to go to the dealer (Most dealers say that is a natural problem)