Same here...had the passenger side door seal replaced days before my warranty expired. I usually park at work facing East so the sun beats on the passenger side. I was getting some deterioration near the B-pillar near the window. It was a surface issue so I let it go until just before the warranty expired. Gotta maximize that 2 year part replacement warranty.
I have some Gummipflege that I plan to start using. 303 AP as well.