Why can't the Xiaomi Robot Vacuum 6 Max charge?

If the Xiaomi Robot Vacuum 6 Max cannot charge, please refer to the following troubleshooting steps:
1. Clean the charging contacts. Gently wipe the charging contacts on the rear of the robot vacuum and the charging springs and black lens on the omni station with a soft, dry cloth to remove dust or stains.
2. Check the power connection. Ensure the omni station's power cable is securely plugged in, the outlet is powered, and the omni station's indicator is on.
3. Adjust the charging environment. Place the omni station against a wall on a flat surface, with no obstacles within 5 cm on both sides and no highly reflective objects within 1.5 meters in front.
4. Manually charge. Place the robot vacuum on the omni station, aligning the charging contacts with the charging springs, and ensure good contact.
5. Check whether the caster wheel and drive wheels are stuck, whether the return-to-charge path is clear, and whether the omni station position on the map is accurate.
6. Check whether the ambient temperature is too low or too high. Make sure the temperature is between 0 ℃ and 40 ℃, and then charge again.
7. If the robot vacuum still can't be charged after checking the reasons mentioned above, please apply for a professional after-sales inspection.