home owner put silicone spray on window track and gum it up .

Take a look at this discussion about the few different ways of removing pivot lock shoes from the window track.

The silicone spray should not have gummed up but to clean up the mess you can use a product like WD40. After cleaning up the mess make sure to wipe it clean because if you leave any WD40 on the track it will eventually gum up on you.