Un-sticking Metal Zippers

Metal zips are notorious for sticking and being difficult to zip/unzip. These can be unstuck so that they slide smoothly by rubbing the metal teeth with the tip of a pencil, then sliding the toggle back and forth a couple of times. If the toggle still doesn't run smoothly the first time, just repeat the process of rubbing with the pencil tip then sliding the toggle until the zip slides smoothly ( a couple of attempts should be sufficient). Be careful not to get any of the graphite from the pencil tip onto the fabric.