Cleaning brush

FIG. 1 is a front, left and bottom perspective view of the cleaning brush showing the new design;

FIG. 2 is a front elevation view thereof, the rear elevation view being a mirrored image thereof;

FIG. 3 is a left side elevation view thereof, the right side elevation view being a mirrored image thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a cross-sectional view taken along the line indicated in FIG. 4 .

The broken line showing of the cleaning brush is for the purpose of illustrating portions of the cleaning brush and forms no part of the claimed design.