What to do if the filter of the Mijia Smart Evaporative Humidifier Pro has an odor?

Odors or foul smells from the filter of the Mijia Smart Evaporative Humidifier Pro are caused by not cleaning the filter and water tank for a long time.
For your reference, here is some information on how to clean your water tank and filter as follows:
1. After draining the remaining water in the water tank, rinse the water tank with clean water at least twice, or use citric acid if necessary. However, do not use hot water above 40 °C or cleaning chemicals (such as fragrances, essential oils, disinfectants, etc.).
2. Remove the filter as shown below:
3. Wash the filter with clean water or a standard laundry detergent, either by hand or in a washing machine. Do not use water above 40 °C or tumble dry.
4. After cleaning, reinstall the humidifier filter into the filter holder, ensuring proper installation.
5. If cleaning does not remove any abnormalities such as blackening or odor, the filter needs to be replaced.