How to clean the Xiaomi Smart Evaporative Humidifier?

For your reference, here is how to clean the Xiaomi Smart Evaporative Humidifier below:
1. Clean the water tank: Empty the water tank, and clean it with a clean, soft cloth. Then wipe the exterior of the tank and the lower coupler dry;
2. Clean the filter: Rinse the filter 2 to 3 times under clean water;
Note:
(1). Do not squeeze the filter or expose it to direct sunlight for drying;
(2). Replace the filter every 3 to 6 months with the genuine ones from the official channel.
3. Clean the water pipeline. To prevent the buildup of scale from affecting the humidifier’s service life, use citric acid to clean the water pipeline once every 1 to 2 months, depending on the local water quality and frequency of use;
Follow the steps below to clean the water pipeline:
(1). Follow the instructions for the citric acid you purchased to dissolve it in water, and then add the citric acid solution into the water tank;
(2). Press and hold the Pause button for 7 seconds to enter the cleaning mode. After 30 minutes, the humidifier will make a beep when the cleaning is completed;
(3). Pour the citric acid solution out of the water tank. Then clean the tank and the filter with clean water.
4. Clean the water level sensor. Clean the water level sensor with a damp, soft cloth. Do not wipe the sensor directly with any hard objects.
Note:
Depending on the local water quality, it is recommended to clean the water level sensor every 1 to 3 minutes.