Went to get into the car this morning and as I looked into the back window, I noticed small droplets of water on the rear seat as it had rained pretty hard last night, and a rather large water stain on the headliner. The car had been sitting for about a week now, and this is the first time this has ever happened. As I'm a sucker for keeping leather seats in good condition, I immediately got out my leather conditioner and wiped them clean, as the moisture from the water would eventually wrinkle my seats. I'm not quite sure if this has to do with the sunroof drainage being backed up, or something else. Any help?