So this past time I went off roading I believe some mud or sand got wedged between my window on the driver's side window and is now scratching the window every time I move the window up and down. What can I do to get rid of the sand or mud? It appears to be smashed into the soft black stuff that seals the bottom of the window where it retracts into the door? Also is there anything I can put on the window to remove or clear up the scratches? Thanks!!