Ralleye Center Cap Noise

I have noticed a popping noise coming from my left year center
cap. I can't figure out why it started doing this. :scratch:
I pulled it off looked at all the clips and it seems fine.
It really sucks when I am creeping through a car show and I
have this annoying pop, pop, pop, coming from this wheel.
Anyone have any ideas? I hate to buy a new one cause these
are all 4 originals. :blob: