<human>:  How do I fix the broken zipper on my coat?
<bot>: To fix a broken zipper, you will need a pair of needle nose pliers, an old toothbrush and some lubricant. First, move the slider to the end of the zipper and gently pull the zipper apart. Using the needle nose pliers, try to move the zipper teeth back into alignment. Use the toothbrush to help brush away any lint or dirt that may be in the way. Apply some lubricant to the zipper teeth and move the slider back and forth to help spread it around. Test the zipper to see if it is now working. If it still doesn't work, you may need to replace the zipper.