Originally Posted by ARON
Looking at the inside of the clamp where it grips the glidebar, I noticed there were 4 polished rectangular sections which causes the clamps to ride the glidebar smoothly.
On the troublesome clamp, 2 of the polished sections have been eaten through significantly and now have the rougher texture of the clamp...
Call Tennis Machines and see if you can buy a new clamp.
I have the ability to drive people crazy, not sure if I was born with it or I learned it but I'm damn good at it.