1. When the opening and closing is not smooth, if the chain is pulled hard, the occlusal bite will be faulty. At this time, apply paraffin or lubricating spray [FASTENERMATE] on the surface and inside of the tooth, and then slide the slider several times to loosen it.
2. When the zipper on the bag is too much when the thing is too much, if the zipper is closed, the zipper is too strong, and the tooth will be detached from the belt. This is serious in the zipper failure. Pull the left and right teeth closer to make the chain easy to pass through the rear zipper.
3. When opening and closing the zipper, sometimes the chain bit bites the line segment or the cloth and the slider can not be pulled. In this case, if the slider is forced to pull, the deeper the bite will be, and the slider should be reversed on the one hand. One side and untied the fabric. When you are completely biting in, do not pull the slider vigorously. Please slowly pull the slider back. Also, when sewing and pulling, please do not leave hidden dangers.