The most common reason zippers get stuck is that dirt and debris often lodges in the zipper slider. Cleaning and lubricating your zipper helps to
How to Lubricate a Zipper - iFixit Repair Guide
5 Ways to Fix a Broken Zipper - wikiHow
How to Fix a Broken Zipper: Repair Stuck or Separated Zippers
How to Lubricate a Zipper - iFixit Repair Guide
Broken Zipper On Luggage Replacement - iFixit Repair Guide
Keeps zippers gliding smoothly. Also great for sticky drawers and windows.
Zipper Lube
Zipper Insertion Pin Replacement - iFixit Repair Guide
How to Lubricate a Zipper - iFixit Repair Guide
iFixit Pro Tech Toolkit IF145-307-4 - Best Buy
85 Pieces Zipper Repair Kit Zipper Replacement Zipper