Condensation
I've checked the Tech Log Philosophy page and this does have a (very) "tenuous connection with aviation". It's about condensation on my windows and I'm asking here because I expect to find experts on Saturation, Dew Point, and Atmosphere.
My (original, Victorian) sash windows have been showing a bit of condensation on recent mornings. I understand why (analogy of cold beer glass). What I don't understand is why that condensation appears at the bottom of each sash (sliding window section). I would have expected the whole glass area to be equally affected. Not gravity - the droplets have not moved.
I'm not looking for DIY solutions - just a technical explanation.