This tutorial showed step by step with detailed instructions on how to fix the broken zipper.

Decrease the gaping between the top and the bottom board using a plier.

terminate the gap carefully by pressing down on both sides.

How To Fix A Broken Or Separated Zipper - DIY Broken Zipper - Easy Hacks and Tips

Image by Science Sir via YouTube

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Next, zip back and forth so that the zipper right back on track.

However, it would not fix and I would create a bigger problem.

Its shocking to me that its that simple to fix.

Use Pliers to Fix Broken Zipper - Fix A Zipper Off Track - Simple Clothing Trick

Easy Ways To Fix Broken Zipper - Repair Separated Zippers - Tighten Zippers