Explaining Things on Instagram: "Zippers are simple mechanisms designed to join two sides of fabric securely. They rely on aligned teeth and a functioning slider to move smoothly. Dirt, bent teeth, or tension on the fabric can cause zippers to snag or jam. The problem is not always sudden. Wear builds gradually until the zipper stops working when needed. Zippers are small components, but they carry constant mechanical stress. The material around the zipper affects its lifespan. Forcing a stuck z

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