A jammed or sticky zipper is one of the more familiar types of zipper problems. It always seems to happen when you're in a hurry, and while yanking at the zipper pull or going for a pair of pliers ...

If you have an annoying zipper that sticks, you don’t have to put up with it! Without proper lubrication, friction between the zipper parts can cause sticking. But don’t retire that garment just yet.