I have a few polyester tops and I get all kinds of stains on them. I have always just thrown into the washer on hand wash. Before doing that though I will try to hit it with some Dawn. Just a little dab on the spot and let it sit for a minute or two. Pour yourself a beverage of choice. Then rinse the spot. As for dry cleaning take it back and tell them it wasn't like that when you brought it in. They usually comply and either reimburse or reclean at no charge. After that a good hand washing or delicate in the washer in cold water and 5 minute toss on low in washer is really all you need. Can't tell you last time I've been to a dry cleaner and that was only when I worked in a couple. Never again. I worked the intake desk. People who work in dry cleaners should wear "hazmat uniforms".