How to check the production date of Kao softener? How about Kao softener?

Kao's softener feels really good to use, so I bought some extra to stock up. What should I do with the production date of this softener? How should I use Kao's softener better?

The product code at the bottom of the package is 8 digits in total, consisting of an English letter and 7 numbers. The first English letter U represents Tokyo, Japan, and E represents Osaka, Japan. The last digit represents the year, the 4th to 6th digits represent the day of production in that year, and the 1st to 3rd digits represent the production line number of Kao, Japan. For example, E0433222 means the place of production is Osaka, Japan, and the production date is the 322nd day of 2012.

Kao fabric softener has a stronger floral scent. It’s said to smell like roses, but it doesn’t smell like roses. It’s more like a mixture of many flowers. I don’t like this smell on clothes.

Fabric softener can make clothes soft and free of static electricity, and it also smells fresher, but any chemical substance can cause some harm to the human body, just to a certain extent, so don't use it frequently. Fabric softener contains a variety of dangerous chemical ingredients, including benzyl acetate, benzyl alcohol, limonene, and linalool. For children, the elderly, and patients, long-term exposure to these chemical ingredients is particularly dangerous.

Generally, fabric softeners use cationic surfactants, which form a hydrophobic film on the fiber surface. Since the fiber surface absorbs the softener, the friction between the fibers is reduced, and the fibers are restored, so the fabric becomes softer, fluffy, and elastic. Cationic surfactants can also produce positive charges. Since most clothes are negatively charged, they can play a certain antistatic role. Fabric softeners use cationic surfactants as the main raw material. After washing, they can make the fiber surface soft, smooth, antistatic, and not easy to stain.