Many answers - many uncertainties?
The following:
You probably had a cement screed installed. I deduce this from the stated "6 weeks".
The screed absolutely needs the water to cure, which was added in excess during installation.
If you were to start drying or ventilating immediately after installation, this would most likely have negative effects on the screed. So wait the first 14 days without drafts or fresh air supply, even if the water runs down the window surfaces.
Forced drying (using condensation dryers) is certainly not necessary; it is enough to dehumidify the rooms with tilted windows after 2 weeks. However, it has always proven helpful to set up fans in small or even windowless rooms. Better one too many than one too few!
Ventilation is the "alpha and omega," as they say, for drying screed.
Sure, when looking at the overall situation more closely, there are certain things to consider.
(A hygrometer is helpful for assessment)
If the humidity outside is currently higher than inside due to "muggy weather conditions," well, in the worst case, the screed can also become damp or at least not dry. Where else should the moisture go??
So now and then take the hygrometer and measure inside and outside.
If it is more humid inside than outside, ventilating with draft-free fresh air supply is certainly the right (and compared to forced drying also more cost-effective) choice.
The note about screed additives can be set aside here because, firstly, there are additives that work, others that don’t, and secondly, the construction progress probably doesn’t allow for this option anymore (the screed has already been installed).
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Good luck and joy in your new home: KlaRa