Yup, I was real happy to see this was just a loose terminal screw. I suspect the contacts may be held in there by the same screw as the ring on the wire so they may be replaceable or at least cleanable but when I was sure the only hot spot seemed to be under the screw, I just tightened everything up and called it a fix. Now it has the old snap so I really do think loose screws are also loose contacts.
