Why does the water tank of the Xiaomi Robot Vacuum H50 Pro station have an odor?

If the water tank of the Xiaomi Robot Vacuum H50 Pro station has an odor, please refer to the following steps to troubleshoot:
1. If the water tank is not cleaned for an extended period, it can result in unpleasant odors. Please clean the water tank regularly.
2. If water remains in the water tank for an extended period without being used, it can result in the development of unpleasant odors. When the robot vacuum is not in use for a prolonged period, please ensure that the water tank remains dry.
3. If water remains in the dirty water tank for an extended period after each use, it can develop an unpleasant odor. Please promptly discard any remaining water to prevent it from stagnating.
4. If the odor is strong, place the water tank in a well-ventilated area and let it air dry for at least 24 hours. Check whether the odor has dissipated.
5. If this phenomenon becomes increasingly severe, please contact the local official after-sales service center for further assistance.