I am mainly wondering how the heating of the air is supposed to affect the presence of steam (water steam, I assume)? Because the fact of heating the air does not remove steam from it, the only thing that happens is the so-called relative humidity changes, because this one depends on the temperature.
I bet because I was supposed to ask exactly the same. However, I think that it is not water vapor that is the problem, but water in the form of an aerosol, i.e. fog, because the drops can be counted like dust. Should the heating then serve to evaporate the water?
I observed such a sensor on the airly.eu website in my area, when there was a fog, it always showed exceeding the norm by several hundred percent. Either the fog increases the smog this way, or it is a distortion of the sensor.