My wife rides a nice FS Specialized. I keep the chain clean and lubed. Today her chain was bouncing around a bit at Boyette. It was a frozen chain link. When I say frozen, I mean it would barely budge. I degreased the chain at home with some stuff from my LBS and then lubed it. No go. It was only marginally better. The link doesn't look damaged. The chain is six months old and has had medium use.
What should I try next? Time for a new chain?