How Do You Reduce Sun Glare While Driving?

Why clean glass matters most

Sun glare is at its worst when the sun is low, at dawn and dusk, and a dirty windshield turns that low light into a blinding wash. A film of dust, dashboard off-gassing, and oily road mist on the glass scatters the oncoming light in every direction instead of letting it pass through, so the whole pane glows. Cleaning the inside and the outside of the glass is the single biggest fix for glare.

Pitting does the same thing over time. Thousands of tiny impact marks from years of sand and grit scatter the low sun into a haze that no cleaning removes, because the marks are in the glass itself. A windshield that glares badly in low sun even after a thorough clean is showing the early stage of pitting, and replacement is the only fix once it affects vision.

Beyond the glass, the practical defenses are the ones every driver knows: drop the sun visor to block the direct beam, wear polarized sunglasses to cut the reflected glare off the road and other cars, and lengthen your following distance so a sudden slowdown does not catch you when you cannot see clearly.

When glare points to the glass itself

The whole windshield glows in low sun even after a clean

The glass is pitted — thousands of tiny impact marks are scattering the light, and replacement is the only fix.

A greasy film returns within days of cleaning

Dashboard off-gassing and oily road mist are coating the inside of the glass; clean it with an ammonia-free glass cleaner.

Glare is worst at dawn and dusk in the same spots

The low sun angle is the trigger, so plan those drives for clean glass, a visor, and polarized sunglasses.

How to cut glare behind the wheel

• Clean the inside and outside of the windshield with an ammonia-free glass cleaner and microfiber cloths.
• Drop the sun visor to block the direct beam when the sun is low.
• Wear polarized sunglasses to cut reflected glare off the road and other vehicles.
• Lengthen your following distance so a sudden stop does not catch you half-blinded.
• Keep the wiper blades clean so they do not smear a film across the glass.
• Have pitted glass replaced once a haze in low sun no longer cleans off.

More questions about sun glare