Howto: Flatten your Ratpadz Mouse Pad - Put It in the Oven
 

Almost at my wits end with this little gem I decided I would go for broke and pop it in the oven and see if that would fix it. I figured if I melted the thing I’d have to get a new one anyway so I didn’t have much to lose. I set it on the middle rack, set my oven to bake at 175 degrees, and crossed my fingers. I let it sit in the heat for about 15 minutes while I checked my email. Upon opening the oven I found the XT even more out of whack when I put it in and the feet were starting to slide in their goo from the heat. I took it out of the oven, playing hot potatoe all the way to the desk and placed some weight on it again while it cooled down. To my surprise, the oven trick worked like a charm.

http://www.fragtheplanet.com/472/flatten-a-ratpadz/