Covering has come loose

Hi

After clearing a filament mess, I noticed that some of the under covering from the fan has come loose. Im not sure how. It doesnt seem to be effecting prints. Would anybody know how this might have happened? Or is it just general wear and tear? I dont particularly want to have to buy a new one and go through that hassle

Oh - I just saw another thread about this. Guess its not too much to worry about. Its just that I can see the wires above it now which made me worry a bit