I noticed the driver window makes a nasty sound when it goes down and has some faint veritcal scratches on it. How do i clean out the felt/rubber rail on the outside without damaging anything?

thats weird. hard way is take everything apart then clean it. other way is roll window down and use a towel honestly lol

as for the felt, i would first try a vacuum. if that doesnt work, try warm soapy water with a brush.