Cleaning Brush

The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee. FIG. 1 is a front and bottom perspective view of a cleaning brush, showing my new design; FIG. 2 is a second perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a rear elevation view thereof; and, FIG. 5 is a bottom perspective view thereof. The dashed lines in the figure are used to represent subject matter that forms no part of the claimed design.