Ironing on it is what warped mine. My mother did it, so I had to act like it was no big deal.

This does work. I used it on mine and now it lays flat again :thumbup:

If you do decide to replace it, use the old one, cut into appropriate size pieces for the bottoms of picketbooks/tote bags.

I put mine on top of the dryer when drying clothes, then lay something heavy on it while it cools.

Worked for me.

Chris