When I open and close my windows it sounds like they are getting all scratched up by tiney dirt particles. I have cleaned in and outside of the windows, but it still makes this awfull grinding noise. I assume that it is dirt particles down inside the door?
How do you easily clean this?
It's sand trapped in the felt at the base of the window. Just take a wire hanger, wrap it in one layer of paper towel, insert into base of window and pass front to back a few times.