What to do if the Xiaomi Robot Vacuum S40 cannot return to the charging dock properly?

If the Xiaomi Robot Vacuum S40 cannot return to the charging dock properly, please refer to the following steps to troubleshoot:
1. Ensure the charging dock is placed in an open area;
2. Please check whether the power cord of the charging dock is plugged in;
3. Check the charging contacts. If they are dirty, please wipe them clean and try again.
If the problem still exists, please contact the local after-sales service center for further assistance.