<human>: Here is a goal: Loosen your hard to use zippers

How would you accomplish this goal?

OPTIONS:
- A zipper that won't move up or down easily can be loosened by applying olive over the zipper.
- A zipper that easily moves up and down can be tightened by grinding down the individual zipper teeth.
<bot>: A zipper that won't move up or down easily can be loosened by applying olive over the zipper.