Q: Over the past year, I have had trouble with zippers that won’t go up. While a few of them are made of metal, most of them are constructed of nylon. I have replaced several zippers but feel there can’t be that many defective zippers. Can you please help me find a solution as I cannot continue to replace these zippers?
A: Most zipper problems can be traced back to solvent charge and crushed slides approximately 95 percent of the time.