A cleaning device in an image forming apparatus, which performs cleaning, comprises a roll-shaped electrically conductive brush grounded via a varistor, a flicker metal rod which is put in pressure contact with the electrically conductive brush and connected to have a potential equal to a potential of the electrically conductive brush, and a cleaning blade formed of an elastic material. Several embodiments of methods in accordance with the invention are directed toward enhancing or otherwise inducing a lasting change in neural activity to effectuate a particular neural-function. The player will use these letters and symbols along with one or more letter drawn by the lottery to form words and compare these words with a list of words.