Perfume has a shelf life. In general, the shelf life of perfume is one year. If the smell of perfume becomes faint or sour, it proves that the perfume has deteriorated inside and needs to be discarded immediately. When the perfume is stored, it should be placed in a cool and ventilated place, and avoid putting it in a high temperature place. If placed in a hot place, the smell of perfume will have a certain degree of change. After using perfume, be sure to tighten the cap of the perfume bottle to prevent the perfume from evaporating in contact with the air. Simply put, perfume, flavorings, spices are volatile substances; they have a certain aroma and fragrance, which can be perceived through the human sense of smell or taste; they are required to achieve the purpose of pleasing to the eye, spiritually pleasing, and enriching and beautifying people's material and cultural life. Perfume is the product of the spice dissolved in ethanol. Sometimes a small amount of additives can also be added according to the need, such as pigments, antioxidants, fungicides, glycerin, surfactants and so on. Different types of perfumes are formulated through perfuming (i.e., the technology and art of blending flavors). What are the best uses of expired perfume? Perfumes that are expired fragrances also have a scent. Dropping it on a scented lamp can make the whole room smell good. Spray on dried flowers Spray expired perfume on dried flowers and place them in pillows or quilts to help you sleep. For Laundry. Soak your washed clothes in a tub sprayed with expired perfume. The clothes will smell good as they dry. Use to mop the floor. Adding expired perfume to the last mopping will leave the floor with a light odor. Spray expired perfume on cotton as a scent in a glass bottle with holes in it, not only for the closet or toilet, but also for the scent.