I had to replace the screw in mine that tightens that down. The head was stripped out and I couldn't tighten it enough to get it to work properly. I went to a marine supply store and got a metric screw with a hex head. That worked great. I also remembered a tip I read somewhere (can't remember where, just remember the tip) to cut a small piece of leather and slide it between the ball and the metal. That worked great. My visor moves fairly easily, but it stays exactly where I put it.