So you should keep them in the shade.Second, the skin care products should be far away from light and high temperature. So write the date you open them is a good way.. This is also the reason why some brands of cosmetics begin to equip with spoon or stick instead.Cosmetics become the main goods that help people to keep fresh skin. However, there are still many nous on using them which we could not neglect.Forth, frozen the skin care productsIf there is a certain kind of cosmetic that you don't often use, but you still want to prolong its life, you should store it in refrigerated counter (not freezer). Fifth, screw the lid down tightlyThe air will quickly lower the active ingredients of the skin care products, so remember to screw the lid down tightly after use. If the products are always exposed to the light and high temperature, the active ingredients of them will disappear. Therefore, if you have already opened your products, you should try to finish them as soon as possible.How to identify your products which should be threw awayIf the color, quality and smell of the products have changed, it is time to discard them. These are all the symbols which the products have already gone bad. The quality warranty of general skin care products is 2 years, and some may 1 year.2) How to extend the cosmetics' life?First, write the date of purchase on the bottom of the bottleRegardless of the products' warranty, you will be difficult to remind when you buy them.1) How to confirm the quality warranty of cosmetics?A bottle of face cream couldn't be use such long time, do you think the product could still use and safe for skin if you put a cosmetic that doesn't finished using for a long time until a layer of dust on its surface? So if you are a madman on storing goods, you should pay more attention on the quality warranty of the cosmetics. Third, wash your fingers before you put them in the cosmetic bottleAlthough most cosmetic products contain the preservatives, and we could rest assured of applying the facial cream and eye cream, it had better to wash your fingers ahead for being not to pollute the cream in the bottle and your face. Observing other prompts if there is no obvious mark, such as the products change into thin down, the water and oil separate, the smell is different or the color changes from white to yellow or light brown. The cosmetic experts could responsible tell you that it absolutely cosmetic plastic tube will be prolong the life of products. This way generally can guarantee the activity of the product. Look at the quality warranty