Setting windows correctly can be tricky and should be done by a specialist company. Tenants in particular are fine here, because Windows are a matter for the landlord.
If it pulls through, the windows hang crooked in the frame or the seal crumbles out, you should contact your landlord, who will then have to fix the problems.
But it’s often not that bad. What often happens are handles that are too stiff or too easy to move, or high noise permeability. If a lot of outside noise penetrates into the room, this is an indication of leaky windows.
The cause may be an incorrectly set contact pressure. Its readjustment haunts as a so-called winter mode through the Internet because it is supposed to seal better and save heating costs at the same time. Is that correct?