I have read in a blog elsewhere that putting your warped cutting board on a
dark asphalt driveway when the weather is over 90º can correct the warp.
I hope so - I just put mine outside at 2 pm and will see how it works and let you
know. It sounds too easy but I hate to have to spend so much money on a new one. I use the 24 x 36" Olfa mat. If I have to buy new, I use my 40% off coupon at JoAnne's and that helps soften the blow....-Judy