Keeping curtains clear
 

Plain wax …. or Maguire’s Cleaner Wax has worked best for me.
I’ve tried assorted products but find leaves a fine film that’s tougher to remove.

I wax the clear curtains about 3x per year and they still look excellent - clear as possible .
Nearly impossible to keep very small scratches here and there but that’s soft plastic and not glass.

Rinse, wash , dry with soft cloth to eliminate spotting and done