An odor neutralizer, for placement on upward facing indoor air intake louvers of a “mini-split” or other ductless air conditioner, comprises a cylindrical container housing an evaporable odor neutralizing gel, and having rows of holes in the container covered by flexible strips that can be removed to expose the evaporable gel to air flowing into the intake louvers. The ends of the cylindrical container are closed by end caps shaped to raise the cylindrical container so that it does not block the louvers and so that it does not roll on the louvered surface of the air conditioner.