Great reply about the snowflake generator :-:

I asked a friend who works in a top Formula One team to explain how the hole might prevent condensation, here's what he came up with:

Of course they do equalize pressure, without them the inner window (i.e. the one closest to you) would probably pop out. Maybe the flow out (when ascending) and in (when descending) means that any damp air in there gets recycled.
The air inside the plane is of course very dry. I think the pressure in a cruising aircraft is about 80% of atmospheric, so you'd expect 20% of the
air in the window space to be removed and replaced on each flight.

I expect the space between the outer and middle windows is completely
sealed, double-glazing fashion.