I haven't made a OH MY GOSH but I would thing you have to be pretty precise with your cutting and piecing. Wouldn't wrinkles make precision piecing harder? I know if I do a "oh heck it will do" I end up usually doing it over

i have just started useing a spray bottle with filtered water and 4 drops of lavender oil i am amazed how well the wrinkles come out--also keeps me calm [i hate ironing]

There is a product called Downey Wrinkle Releaser that is not a starch but is used just for getting rid of wrinkles. I use it all the time on stubborn wrinkles. It's sold in the laundry aisle and not expensive. It may be worth a try before you replace all that fabric.

why not try the commercial products, if you don't like them you know you can bring them back and not have to deal with any snooty LQS ladies!

Heck, if the wrinkly piece is big enough, try ALL of them and give us a consumer report!

If you washed it all in one piece, that may have caused the twisted up dried in wrinkles. In that case I would cut it into smaller pieces that are easier to manage (like 1 yard) and rewash and dry it. Heck, maybe just cut off one yard and try it. Good luck.

I had this issue with a fabric. The only thing I found that worked was washing in 1 yard pieces and drying it with (new and clean) tennis balls in the dryer to beat it into oblivion. When it came out of the dryer it was much, much better and the best press took out the last few wrinkles that for whatever reason stayed along the selvage edge.

I've had good luck with "wrinkle releaser" - I think it's a Fabrese product.

I agree with Mike's Girl. Too much time will be spent to get an "iffy" result. It's a lot of money invested, I know, but maybe it could be used for rag rugs or those clothesline baskets?

Yeah, your right about the fiber content. Perhaps there was enough polyester to heat set some wrinkles in. Burn testing a bit of it would help you see this.