How and when should I vacuum the sensor window in my air purifier?

Issue

Dust accumulated in the air quality sensor(s) can result in incorrect readings and affect the product performance. Use a vacuum cleaner with a soft brush to remove any dust that might accumulate in this area. Vacuum (at least) once a month if the product is used daily. Never use abrasive, harsh cleaning tools. This can damage the sensor.
If the problem persists, even after multiple cleaning attempts, please contact an AEG service centre for further guidance.

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