Let in a little fresh air occasionally. It's good for you! āØ
But be careful!
Leaving the window open for a longer period during winter āļø leads to insufficient air - moisture exchange. š
ps: I am a litte bit confused, because of the Hard Fork 20 and all the changes it brings. Unfortunately I don't really understand the new concept, so I just keep posting and doing everything as I did before. If any recognizable changes occur I will react. But for now no stress. šš±š