<human>:  How do I fix a broken zipper?
<bot>: Start by checking to see if the zipper is still attached to both sides of the item. If so, try to hold the two sides of the zipper together and zip up from the bottom to the top, gently tugging the zipper teeth when needed. If it does not close, unzip it again and pull the slider all the way to the top. Then, grasp the two sides of the zipper and move the slider back down the teeth, pressing the zipper teeth together each time.