I once left my Fiskars mat in the back seat of the car not thinking that when it got hot from the sun that it would droop over the seat but it did. I did everything that I was told to try to straighten it up but it would not flatten. I finally called the Fiskars company and after telling them the many things that I had tried to flatten it back out, they told me they would send me a new one at no charge. They did and I'm still using it 4 years later. Maybe you could try that if one of them was a Fiskars.