The main mode of cleaning of an electric toothbrush like the sonic toothbrush is conventional. It is produced by the scrubbing action of the brush's bristles on the surface of teeth. For instance, sonic toothbrushes do create extremely effective brushing action. This is due to the high number of brush strokes per minute that these toothbrushes can generate. Because electric toothbrushes are capable of producing more than 30,000 brush strokes per minute, they are more effective than the number of brush strokes created by hand. Brushing by hand generally produces about 300 strokes per minute.