I have a computer desk with a pull out shelf for my keyboard. When we moved, the keyboard got jammed so that it wouldn't slide back and forth anymore, so I put some silicone spray on it. It moves fine now. Too fine! It keeps moving every time I type, and is beyond annoying. Does anyone have any suggestions that won't damage the pull out shelf? What I am looking for is a way to slow down how easily it glides back and forth.