To the best of my knowledge, this center button has never "clicked" like its supposed to, and I'm wondering if something could be done to fix it. I have to push pretty hard on it now to get any kind of response. Don't know what gen it is, I've had it for a while now.
You can see in the pic how its recessed....should be able to anyways.
You can see in the pic how its recessed....should be able to anyways.