FIG. 1 is a rear and left-side perspective view of a cleaning brush showing my new design;
FIG. 2 is a top, front and right-side perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a second top, front and right-side perspective view thereof, wherein the cleaning brush is rotated about a half-turn about the vertical axis from the position shown in FIG. 2; and,
FIG. 10 is an enlarged view of the encircled portion 10 of FIG. 1.
The broken lines in the drawings are for the purpose of illustrating portions of the cleaning brush that form no part of the claimed design.