I claim the ornamental design for a grill ash sweep, as shown and described.
FIG. 1 is a top perspective view of the grill ash sweep shown in an environment of use, showing my new design;
FIG. 2 is a bottom perspective view of the grill ash sweep shown in an environment of use;
FIG. 3 is a top perspective view of the grill ash sweep;
FIG. 4 is a top view of the grill ash sweep;
FIG. 5 is a first side view of the grill ash sweep; and,
FIG. 6 is a second side view of the grill ash sweep.
In FIGS. 1 and 2, the broken lines representing a grill depict environment and form no part of the claimed design. All other broken lines in the drawings show portions of the grill ash sweep and form no part of the claimed design.