Guys, here is my advice. I had this issue as well after stupidly applied VAL watermark removal on front windscreen. I could see that terrible white marks/haze under direct sunlight, and during night it was too much of glare against any upcoming lights....

i tried Amway Polish, Meguiar Wax, Dish drops liquids, and so on..
Nothing worked.

The only method which worked for me was... To polish the windscreen using Cerium Oxide powder (you can google or there are some youtube videos).. it is a chemical powder (orange in color) and it is used to remove minor scratches on any glass surface. It is safe, not acid. I did this at a car wash shop in Shah Alam Sek 20. Just need a polisher machine and buff the surface (screen) using cerium oxide powder + water. Must be done in wet condition. Dont let it dry while buffing, add water from time to time.

There is one local company selling this powder (cerium oxide glass polishing powder) online Shopee/FB. Factory is located in Puchong.

Kleenson Glass Powder.

If you buy from China via online, it is much cheaper + more quantity. But you have to wait for shipment.

I did this and my screen is 80 - 90% better now.