That sucks! Were you ever able to get it out? I used to have the weirdest thing that would happen with a Mitsubishi Galant that I had... somehow, some kind of thick, black grease, almost like tar, used to leak from inside the driver's side door. I could never figure out what it was, or where it was coming from. I did my best to clean it regularly, but if I was getting into my car and it was there, occasionally it ended up on the bottom of my shoe, and that spread it all over the pedals and floor of the driver's side. Whenever I took it to the car wash, they wouldn't believe that it was coming from the door, and would always insist that I stepped in tar! Anyway, I never did figure it out...