The Fresh N Clean Solid Odor Deodorizer is used to remove tough pet odors. It can also be used in your car, shoe closet, gym locker, track containers or just about anywhere. To use, Remove Lid and Seal and then Place the Container Near Source of Odor. For Stronger Odors, Remove Product From Container and Place Solid Product On top of Lid to Allow Air Flow Around the Entire Product. The product should be placed when it has shrunk to a small disk.