Things we do on a daily basis create moisture in the air. The biggest culprit is cooking where an average of 3 litres of steam is released per day. Moisture also comes from other activities including washing clothes, showers and doing the dishes.
But did you know moisture also comes just from living in a house? Breathing releases moisture into the air. Pot plants also let out moisture, depending on how much you feed them. In short, there’s no way to prevent moisture in the air. All you can do is ventilate it properly to keep your home healthy.