AEV center caps keep falling out.
 

I just purchased my third AEV center cap for the same wheel. For some reason it just falls out after a few weeks of driving. I've even rotated and balanced the tires, and it still happens to the back passenger wheel, even when it's a different wheel. Has this happened to anyone else? I'm going to put some RTV silicone on it this time to hopefully keep it in place, and hopefully seal all of them when I get my tires rotated and balanced again. It just sucks that it always happens to the wheel in that back passenger position.