bath waters maybe in for best part of an hour at a time, and sometimes the door left open.
We used to do this, ended up buying a dehumidifier because we didn’t realise how much trouble it caused. Were without the bath for a month in winter whilst I slowly redecorated (good test of a marriage, whether your wife puts up with washing in the kitchen for a month in winter) and the damp vanished ! As you might imagine, we don’t leave bathwater lying around now.
Also, condenser tumble driers aren’t as efficient as you might think. We got the one Which recommended and, using a hygrometer to measure it, the house humidity rises by nearly 10% when it’s in use, and stays elevated for a couple of hours.