Unjam a Zipper

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WD-40 can assist in loosening a zipper by providing lubrication and reducing friction. When a zipper becomes stiff or stuck due to debris, corrosion, or wear, WD-40 can be applied to the zipper’s teeth and slider.
Start by spraying a small amount of WD-40 on a clean cloth or directly on the zipper’s problematic area. Then, gently work the zipper back and forth to distribute the WD-40 and allow it to penetrate. The lubricating properties of WD-40 will help to loosen the zipper, making it easier to open and close smoothly.