Well, I tried it with the white vinegar. First pass it got rid of 90% of the wrinkles (all but the main fold crease). I set those aside and then tried another pass at it, and it didn't seem to work. So I just set them on top of the pile and started using the squares from my first pass and guess what? When I went to find those other ones, I couldn't find them! Somehow by letting them rest and cool down, the remaining creases disappeared!
So, other than smelling like salad dressing, it works! THANK YOU for this tip! I would not have thought to try white vinegar for creases!