My window has been working somewhat "tight" over the past few months and a few days ago, something came loose from behind the window. It was making the window unusable, so I straightened out a metal clothes hanger and managed to pull it out.
Before I took it out, I imagined it would be a rubber material that kept the outside air from flowing through. However, it turned out to be a long plastic material.
Like the title says, I'm wondering what this is, and if it is something I should replace ASAP. Thank you!!
I'm sorry if the picture isn't enough to tell clearly. It was rather difficult to take a clear picture of something so long and white. Both the following pictures should be linked to the full image.
Here is a picture of my window and the arrow points to the area where the plastic bar came out from. It came out from behind the top(?) part of the window panel that slides up and down.