Vinegar and water is the time-honored method. The sizing is a good idea, but sizing and sarch add to the fabric. I like Mary Ellen's Best Pressed. I get it a gallon at a time. When I spray it on crinkled fabric, I can watch the fabric relax. It adds body without stiffness or white flakes. JoAnns has it in various scents and scent free.
Good luck and thanks for your kindness.

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!

Vinegar isn't an acid, it's a base. Just sayin'... ;)

Christine-
http://quiltdasher.blogspot.com/

I do like Marge and use the white vinegar trick. Works every time.