Check whether the zipper is stuck, misaligned, missing teeth, or has a broken slider
Gently work the zipper up and down to free any fabric caught in it
Apply graphite from a pencil, soap, or zipper lubricant to help it slide
Use tweezers to remove trapped threads or fabric
Realign both sides of the zipper teeth before pulling the slider
If the slider is loose, gently squeeze it with pliers
If the slider is damaged, replace it with a new one
If the top or bottom stop is broken, replace the stop with pliers or a new stopper
If teeth are bent, straighten them carefully with pliers
If teeth are missing, replace the zipper
If the zipper separates after closing, tighten or replace the slider
If the pull tab is broken, replace it with a key ring or new pull
Test the zipper several times after each repair
Replace the entire zipper if the damage is severe