Slide the zipper pull to the bottom
Check for missing or damaged teeth
Realign both sides of the zipper track
Gently squeeze the zipper pull with pliers
Test the zipper after each small adjustment
Replace the zipper pull if it is worn out
Replace the zipper slider if it no longer grips the teeth
Sew a new zipper if the teeth are broken or missing
Use wax or graphite to help the zipper move smoothly
Avoid forcing the zipper if it keeps separating