Move the zipper slider all the way to the bottom of the zipper before you do this. [2] X Expert Source Margo WestProfessional Tailor Expert Interview. 7 December 2020.
Make sure to pull off the same amount of teeth on each side of the zipper. Discard these zipper teeth. You will not need them.
Set the top stops and zipper pull aside.
Line up the spot with the broken or missing teeth as well as you can.
If you don’t want to use a new zipper bottom stop, then you can also sew over the area with the broken teeth. However, you will need to sew over the area completely to prevent the zipper pull from going into this area and coming off the track.
Sew the snipped area by stitching across the zipper from side to side with a needle and thread, which will keep the zipper on track. [13] X Expert Source Margo WestProfessional Tailor Expert Interview. 7 December 2020. If there are any teeth missing, this will shorten your zipper. [14] X Expert Source Margo WestProfessional Tailor Expert Interview. 7 December 2020.
Be careful not to get the wax or grease onto the surrounding fabric.
Another option is to spray some hairspray onto your zipper to prevent it from sliding down as easily. Spray hairspray along the length of the closed zipper teeth. This should make them tacky enough that the zipper will not keep sliding down.
