<human>:  How do I repair a broken zipper?
<bot>: The first step to repairing a broken zipper is to identify the exact type of zipper. Depending on the type of zipper, you may need different tools to repair it. For instance, if it is a metal zipper, you may need a pair of pliers to realign the teeth. If it is nylon, you may be able to realign the teeth using your fingers. To finish any zipper repair, you should use wax to lubricate the slider and the teeth, which should allow the zipper to slide more easily.