Why does my Macbook lid crackle?

Question

macbook

Macbook Air 2017 started to crackle when opening the lid. The sound is as if there are some crumbs between the top and bottom covers. The laptop is only a month old. Not that this is very annoying, but there are 2 questions:
1) What could be causing this if the laptop is practically new and used very carefully?
2) Can this lead to some more serious problems?

Answer 1

I don’t think this is a serious reason for worrying, maybe these are loops and something got into them. But it’s better to go to the SC to find out this reason.