Step-by-Step Fix
Check the Problem: Most broken zippers are stuck because the teeth aren’t aligned or the slider is loose.
Lubricate the Zipper: Rub a graphite pencil tip, soap, or candle along the zipper teeth. This makes the zipper slide smoothly again.
Align the Teeth: Slowly move the slider up and down while making sure the teeth line up properly.
Tighten the Slider (if needed): If the slider is loose, gently squeeze it with pliers so it grips the teeth better.