Cleaning Brush

FIG. 1 is a front, right and top perspective view of a cleaning brush, showing my new design; FIG. 2 is a rear, left and bottom perspective view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is an enlarged top plan view thereof; FIG. 8 is an enlarged bottom plan view thereof; FIG. 9 is an enlarged view of portion 9 in FIG. 1 ; FIG. 10 is an enlarged view of portion 10 in FIG. 1 ; FIG. 11 is an enlarged view of portion 11 in FIG. 2 ; FIG. 12 is an enlarged view of portion 12 in FIG. 2 ; and, FIG. 13 is an enlarged view of portion 13 in FIG. 1 . The evenly-spaced broken lines shown in the drawings illustrate portions of the cleaning brush that form no part of the claimed design. The short-dash, long-dash lines depict the bounds of the enlarged portions that form no part of the claimed design.