If you have any heat where you are,leave them in the sun flat on the floor and they should settle. If not, an alternative is to use a heat gun. Just don't use it too close or leave it in any one spot too long or you'll damage the mat. Fan the gun back and forth. If it still rises, heat it up and put something heavier than the mat to hold it down. I'd say a phone book but I don't think anyone has any (I'm dating myself lol). If you don't feel comfortable using heat just put the weight on it send hope it corrects itself. If you don't have a heat gun you can get a cheap one at Harbor Freight tools for less than $10 I think.
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