The ornamental design for a facecleansinginstrument, as shown and described.
FIG. 1 is a perspective view of a face cleansing instrument, showing my new design;
FIG. 2 is another 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 a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken line showing of the face cleansing instrument is for the purpose of illustrating portions of the article that form no part of the claimed design.