Embodiments of the invention relate to correction of erroneous touch data on a touch sensor panel. Erroneous touch data may occur when a user is touching locations on the touch sensor panel but fails to be in good contact with another part of the device including the touch sensor panel. These erroneous readings may be statistically compensated for. A capacitance value that combines various external capacitances that may cause erroneous results can be calculated. Then, if necessary, received touch data can be modified to take into account the external capacitance. Accordingly, improved accuracy is provided for determining touch event(s) on a touch sensor panel.