Quite good but not optimal

The device works quite reliable and does what it should - it cleans the air. However, in our party room if 3 people smoke, it does not get clean air. The room has only 16 square meters, but still the performance is not enough. The sensor is very useful, the device automatically switches on a, but the indicator is sometimes red for bad air, but the device does not turn on. You have to manually turn off the sensor, and then re-enable it - then the device has been resumed.