In heavy fog
https://xeon-wiki.win/index.php/Repair_or_Replace%3F_Deciding_for_Side_and_Rear_Car_Windows_48731
In heavy fog, stay the windshield blank inner and out; contaminants improve glare from headlights and reduce depth belief.
In heavy fog, stay the windshield blank inner and out; contaminants improve glare from headlights and reduce depth belief.