|Turn off laptop and remove ac power and battery.|
It may be possible to help it. If you carefully remove the key but using maybe wooden skewers or such to pry it up from two opposite side it might lift up the key and out.
Then use a bit of lemon pledge or some other silicone based furniture wax. (not wax at all anymore). Wipe off excess and push the key back in and try it.
Why did it take me over a year to phone in a problem to ATT?