I'd appreciate any advice on this problem I've had for a few months. One of my cable adjusters (pictured below) makes a creaking sound every time the handlebars move. It seems to come from the ferrule rubbing against the threaded cable stop; if I spray some oil in there it will quiet up for a few days but always comes back. I've tried both cleaning it out and covering it with grease to no avail. I was thinking about removing the ferrule - are they necessary in this location? Are plastic ones available? any other suggestions appreciated.