<human>: Goal: use steel wool to clean the pipe

Which of the following methods is more reasonable for accomplishing this goal?

OPTIONS:
- Wearing gloves to protect your hands, run the steel wool along the middle of the pipe, inside and out
- Wearing gloves to protect your hands, run the steel wool along the ends of the pipe, inside and out
<bot>: Wearing gloves to protect your hands, run the steel wool along the ends of the pipe, inside and out