Normally I just push on the thread side while unscrewing the other side. The little plastic ring should just thread itself off...Don't Lose It! You can re-thread it onto a new screw. If pushing on it doesn't work, you can use a pin to hold it in place while unscrewing it.
![[Image: 7071.gif]](https://www.allsmileys.com/files/sweetim-texticons/7071.gif)