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.

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.

