The ornamental design for a sanitizingfogger, as shown and described.
FIG. 1 is a front-top perspective view of a sanitizing fogger showing my new design;
FIG. 2 is a front-bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left elevational view thereof, where the right elevation view is mirrored thereto;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of the claim is included for the purpose of illustrating portion of a sanitizing fogger and forms no part of the claimed design.