How to dissasemble galaxy buds case

Hi

I want to open the case because i have some dirt in the hinges but im scared to break the thing, i already popped the piece where the buds normally sit out a little with a knife in the front and then went arround the sides so its like about 3 milimeters out but i dont know how to take it out

do i have to pull it out from the front or does it need to be openend more. I cant pull it out from inside of the case