A method for detecting a position of a touch on a touch sensing element, the touch sensing element comprising a first film and a second film each comprising two electrodes and a capacitor configured to be selectively coupled either to one of the two electrodes of the first film or to one of the two electrodes of the second film, the method comprising: connecting one of the two electrodes of the first film to the high voltage terminal of a power source and connecting the other of the two electrodes to the low voltage terminal of the power source to provide a first potential difference on the first film between the two electrodes placed on opposite sides of the first film; connecting the capacitor to one of the two electrodes of the second film to be charged when pressure is exerted onto the films in order to bring them into contact, following a touch by a user by a division voltage of the first potential difference formed by an equivalent circuit of the first film, the second film and a contact resistance between the first film and the second film; characterized by: sampling a charged voltage of the capacitor to obtain a plurality of first voltage values and calculating a first voltage variation as a difference between two first adjacent voltage values, a difference between two first voltage values, an average of the plurality of differences between each two adjacent first voltage values or a variation of a plurality of differences between the adjacent first voltage values; comparing the first voltage variation with a threshold value; ignoring the plurality of first voltage values when the first voltage variation is larger than the threshold value after being charged for a predetermined time period; and post-processing at least one of the first voltage values when the first voltage variation is smaller than the threshold value. connecting one of the two electrodes of the first film to the high voltage terminal of a power source and connecting the other of the two electrodes to the low voltage terminal of the power source to provide a first potential difference on the first film between the two electrodes placed on opposite sides of the first film; connecting the capacitor to one of the two electrodes of the second film to be charged when pressure is exerted onto the films in order to bring them into contact, following a touch by a user by a division voltage of the first potential difference formed by an equivalent circuit of the first film, the second film and a contact resistance between the first film and the second film; characterized by: sampling a charged voltage of the capacitor to obtain a plurality of first voltage values and calculating a first voltage variation as a difference between two first adjacent voltage values, a difference between two first voltage values, an average of the plurality of differences between each two adjacent first voltage values or a variation of a plurality of differences between the adjacent first voltage values; comparing the first voltage variation with a threshold value; ignoring the plurality of first voltage values when the first voltage variation is larger than the threshold value after being charged for a predetermined time period; and post-processing at least one of the first voltage values when the first voltage variation is smaller than the threshold value. sampling a charged voltage of the capacitor to obtain a plurality of first voltage values and calculating a first voltage variation as a difference between two first adjacent voltage values, a difference between two first voltage values, an average of the plurality of differences between each two adjacent first voltage values or a variation of a plurality of differences between the adjacent first voltage values; comparing the first voltage variation with a threshold value; ignoring the plurality of first voltage values when the first voltage variation is larger than the threshold value after being charged for a predetermined time period; and post-processing at least one of the first voltage values when the first voltage variation is smaller than the threshold value.