On the back of the MusicPad you will find a small hole, large enough to place a pin or bent paper clip into. You'll find it near the lower left hand corner about 2.5 inches from the left side and 3.75 inches from the bottom. While the unit is powered up, press a pin or similar object into the hole. Place it far enough into the hole and apply enough pressure the engage the reset button internally in the MusicPad. Once the button is pressed the calibration screen shall appear on the display. Touch the center of each cross hair carefully without placing any part of your hand on the touch screen. Once complete the re-calibration is done.