How often does the Xiaomi Truclean W20 Wet Dry Vacuum need to be maintained and what is the replacement cycle?

It can be evaluated based on daily usage frequency. General recommendations are shown in the following:
Maintenance Frequency
1. Dirty water tank components (including the dirty water tank, the water level sensor, and the filtering basket) should be cleaned after each use;
2. Dirty water pipeline should be cleaned after each use;
3. Floor brush should be cleaned once a week, depending on the dirtiness;
4. Self-cleaning is required after each use of the roller brushbar;
5. Filter should be cleaned once a week;
6. Self-cleaning charging dock should be cleaned once a week.
Replacement Frequency
Note:
The following recommended replacement frequencies are for reference only. Components should be replaced promptly if damaged.
1. Roller Brushbar should be replaced in 3-6 months;
2. Filter should be replaced in 3-6 months.