1. The shelf life of the perfume after opening is one year, and it is the best to use it within one year, which not only brings its value into play, but also makes you emit fragrance. After one year, the perfume is not so good. Both the smell and appearance will change. You must use it carefully.
 2. You should know that perfume is volatile, which is also the reason why perfume will smell good when sprayed on your body. So after opening a bottle of perfume, under the action of temperature and light, the natural volatilization speed is relatively fast, so most perfumes are stored in a cool and dry place. Many people also store perfume in the refrigerator, which is a good way. But you must add a layer of packaging bag when you put it in, so that it is safer and will not smell.
 3. If the perfume has expired, it is recommended that you do not use it again, which may hurt your body, be bad for you and be harmful to you. You can use it as spice, spray on houses, toilets, plush toys and so on. This will neither waste nor harm your body, killing two birds with one stone.