The ornamental design for a respiratorsanitizer, as shown and described.
FIG. 1 is a top perspective view of a respirator sanitizer;
FIG. 2 is a side perspective view of the design;
FIG. 3 is a front view of the design;
FIG. 4 is a top plan view of the design;
FIG. 5 is a left-side view of the design;
FIG. 6 is a right-side view of the design;
FIG. 7 is a bottom plan view of the design;
FIG. 8 is a rear view of the design; and,
FIG. 9 is a bottom perspective view of the design.
The broken lines depict portions of the respirator sanitizer that form no part of the claimed design; the broken lines form no part of the claimed design.