I'm having the same problem on the volume and track buttons. at night the light is shining through it. Neither of us have nails and the car only has 9k miles. Will be making an appt. with the dealer.
I also recommend you speak to your Ford dealer about this and have it diagnosed, aldocella1. Your service manager will be in the best position to assist you with this. If you need any further assistance, please do not hesitate to PM me.