The ornamental design for a computercleaningbrush, as shown and described.
FIG. 1 is a perspective view of a computer cleaning brush showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a perspective view of the brush shown in the position of use.
The broken lines shown on the front and rear of the article are included for the purpose of illustrating portions of the article that form no part of the claimed design.