What should windshield washing fluid contain during winter?

Windshield washing fluid used during winter should contain an anti-freeze solution to prevent it from freezing in cold temperatures. This is important for maintaining visibility while driving, as standard water-based solutions are prone to freezing, especially when temperatures drop significantly. An anti-freeze solution helps ensure that the fluid remains liquid, allowing drivers to keep their windshields clear of snow, ice, and road grime. Additionally, this solution typically includes detergents to aid in cleaning the windshield effectively.

Using plain water or just soap solutions would be ineffective since they can freeze, leading to blockage in the washer system and poor visibility. De-icing chemicals alone may not suffice for cleaning purposes unless combined with an anti-freeze base, making them less effective as a standalone solution for winter washing fluid. Thus, the formulation that includes an anti-freeze component is critical for safe winter driving conditions.