The only way i know of to repair it is to pull off the window, clean it, apply the ceramic coating and bake it on with one of those special lamp things...
I bet we get bent over on this deal.
The easiet way for them to repair it is to replace the window and send in the old ones to be refubiished so they can be sent to futture claims with this issue. It's costly and probably effects a rather large percentatge of the cars. I bet they expect a 100% failure rate over time. What you hear is also correct - Until they can root cause it and implement a permanent soltion they are probably not going to replace anything.
-marc