The high grade of material used for the ELECTROLUX filters provides your vacuum cleaner with strong airflow and high suction power as well as a high filtration level and maximum dust retention. So your vacuum cleaner’s motor is protected from dust particles inside the dust container. To ensure the performance of your vacuum cleaner, we recommend you to clean this Hygiene Filter E10 regularly. Turn the washable Hygiene Filter following recommendation and pull it away, you can use a brush to take away dust and particles attached to the filter. When the filter indicator turns red or the filter gets visibly dirty, wash the filter under running water and let it dry before replacing.