WHILE DRIVING ON A HIGHWAY, THE DRIVER SEAT SUDDENLY OVERHEATED (THE SEAT WARMER WAS TURNED ON). IT STARTED WITH A BURNING SMELL. EXCESSIVE HEAT BURNED MY LEG A BIT (SOME SKIN REDNESS), BEFORE I REALIZED WHAT IS HAPPENING AND TURNED THE SEAT WARMER OFF. THE SEAT LEATHER NOW APPEARS STIFF AND WRINKLED (NOT SOFT AND SMOOTH LIKE THE REST OF THE LEATHER) IN THE AREA WHERE I FELT THE HEAT.