I have a light glass polish but the windshield has so many divots from rocks that it’s damn near impossible to get the polish buffed off. When driving into the sun it looks like you’re staring into the Milky Way.
Glass polishes typically need to be rinsed off or wiped with a wet towel.
A regular polish or compound will be fine to deep clean the glass.
You're not correcting scratches.
Once the alcohol wipe is done, it should be clean/clear