I think it may be part of the interior? I tried a pry bar, needle nose pliers, pick tool, etc. I was able to lift the gasket and even part of the door panel but those threads are definitely stuck on something or attached somewhere. I ended up basically pulling each hair until it broke off so now it looks like a buzz cut lol. No one would notice but me at this point but I wanted to post in case someone else had this and the Tesla guy tells them it's just something you can pull out when you get home, like they told me. Hope everyone gets their cars soon! Good luck!