Why can't the robot return to the base after cleaning?

1. The robot may have encountered obstacles during cleaning, preventing it from returning to the base station.
2. The robot may have failed to escape a confined space, preventing it from returning.
3. Ensure there is at least 60cm of space in front of the base station.
4. The return-to-base sensor at the bottom of the base station may be dirty, so wipe it clean.