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How to fix a broken zipper?
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First, attempt to repair the teeth of the zipper. If the teeth are still intact, use pliers to try to move the slider. If that fails, try applying lubricant, such as graphite or a product designed specifically for zippers. 2 If the slider won’t stay put and the teeth are visibly damaged, you’ll need to replace the zipper. First, measure the length of the zipper and find a replacement of the same size. 3 Next, remove the existing zipper and transfer any loops, or eyes, onto the new zipper. 4 Attach the ends of the zipper onto both sides at the seam.5 Secure the zipper, either by stitching or with glue. 6 Test out the zipper, and you’re done!