My humidifier is on but the humidity level is not increasing. What's going on?

First, you need to check that the hygrostat is set to maximum or in continuous mode. The humidity level in a room can take time to rise, this will depend on the coverings, the furniture, its temperature and its geographical location. For example, the most extreme case would be a chalet in the mountains (at altitude) with underfloor or stove heating. In this case, you can fill your humidifier once or twice a day and not see any change in the humidity level.

However, this water is going somewhere: it is the materials that make up the room that use this water. Indeed, for a wooden chalet, it is first of all the wood that absorbs what it needs. It can take up to 15 days to see the level of the room rise.