
To keep your PHILIPS AC1711 Air Purifier operating at its best, you should clean its filter surface every two months. Also, the particle sensor should be cleaned using a dry cotton swab every two months. These cleaning routines are recommended in the PHILIPS AC1711's user manual and will help maintain the air purifier's efficiency. Note that if your air purifier is used in a particularly dusty environment, you might need to clean it more frequently to ensure optimal performance and air quality.


