What do you use to clean vinyl windows
Check with people that collect old cars.
I normally wash with shampoo, both sides, then, once dry, rub with alcohol, again both sides. Polish both sides with automotive non abrasive (do not use the ones to remove scratches or that indicate abrasiviness)car polish.
Finaly, remove all residue with alcohol, and wash again with mild shampoo.
I do that in old cars and works.
Motorola had a product to polish their mobile phone screen, but I can''t remember the brand.