During heavy rain, it's better to set the windshield wipers to a fast speed. This ensures that the windshield is cleared quickly and continuously, maintaining good visibility and improving driving safety. Using a slow speed in heavy rain may not remove water efficiently, which can obscure your view and increase the risk of accidents.
However, the wiper speed should always match the intensity of the rain - use slow or intermittent settings for light rain and switch to high speed during downpours.
