...it has always been there since I bought this car 13 years ago
One thing that can amplify the effect are those cleaners like Armour All but you probably thought of that. Found this…..
To reduce windshield reflections and glare effectively, consider the following expert tips:
• Wear polarized sunglasses: These lenses have special filters that block intense reflected light from the windshield, greatly reducing glare especially during sunrise, sunset, and at night from headlights.
• Keep your windshield clean inside and out: Dirt, streaks, and tiny scratches or pits on the glass scatter light and increase glare. Use microfiber cloths and dedicated auto glass cleaners like “Invisible Glass” for best results. Cleaning the inside of the windshield is just as important as the outside.
• Replace worn-out windshield wipers: Old wipers leave streaks that cause bright spots and worsen glare. New wipers improve visibility and reduce refracted light.
• Avoid glossy dashboard coatings: Shiny or oily dashboard products reflect sunlight onto the windshield, creating distracting reflections. Use matte finish conditioners instead.
• Consider anti-glare or reflective films/coatings: Applying an anti-glare coating or reflective film on the windshield can reduce light intensity and reflections. Some aftermarket treatments or specialized glass upgrades also help.
• Use windshield sun visors or tinting: Sun visors block direct sunlight, and window tinting reduces the amount of light entering the car, both helping to minimize glare.
• Repair or replace damaged windshields: Chips, cracks, or pitting increase glare by refracting light. Repair minor damage promptly or replace the windshield if necessary to restore clear visibility.