How do you clean polyester?

Try Naptha (zippo lighter fluid) or Acetone. Neither should harm the polyester but will cut through the crud.

You can't. The crime scene investigators are going to find it eventually, and you are going to do hard time.

with a mild solution of vinagar and water in a spray bottle and a cloth

By washing and ironing

It takes 12 hours to clean the windows of a certain office building. During the first day of cleaning, the workers were able to clean for 9 hours. If the variable t stands for the amount of time the...