Cleaning the Front Caster Wheel
- Pull firmly on the front wheel module to remove it from the robot.
- Pull firmly on the wheel to remove it from its housing (see illustration below).
- Remove any debris from inside the wheel cavity.
- Reinstall all parts when finished. Make sure that the wheel clicks back into place.

Important: A front wheel clogged with hair and debris could result in damage to your floor. If the wheel is not spinning freely after you have cleaned it, please contact Customer Care.
https://manuals.plus/irobot/j7-roomba-robot-vacuum-cleaner-manual#ixzz7qWSQTJ65