Xiaomi Smart Air Purifier 4 Pro Manuel D'utilisation page 9

Daily Care & Maintenance
Cleaning the filter compartment
To ensure optimal ventilation and purification, use
a vacuum cleaner to remove any dust from the air
inlets and the filter compartment, or wipe these
areas gently with a soft cloth.
Note: To avoid damaging the purifier, do not rinse or spray
the filter compartment directly with water, or wipe it with
a soaking wet cloth.
Cleaning the laser particle sensor
Use a non-sharp tool to open the cover of the laser
particle sensor, then use an air blow gun or hair dryer
to clean the filter on the cover and the sensor, as
illustrated in the figure.
Note: Do not use hot air.
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