Fog over - Idioms by The Free Dictionary
[for something made of glass] to become covered over with water vapor. The windshield fogged over because I forgot to turn on the defroster. The mirror fogged over, and I couldn't see to shave.
References in periodicals archive
Harbhajan dismissed Matt for two and Broad for one in his first two overs after England had resumed on 282 for six in the morning following a two-hour delay caused by fog over
Studies in numerous cities in the US have shown up to 10 times increased distance in fog over
first generation technology.