The nylon bristles of the D-SLR Brush TM are statically charged by blowing air through them. This not only charges the brush but it helps dislodge & remove any previously captured dust particles still in the brush. With a freshly charged brush, you whisk ever so lightly across the sensor, the charge on the bristles attracts the dust from the sensor onto the bristles leaving you with a clean sensor. No sensor cleaning brush will totally eliminate the need for the wet method of sensor cleaning, but with the D-SLR Brush TM you wont have to use the wet method as often, saving you time, products & money.