Kiehl's avocado eye cream water and oil separation, is the phenomenon of expiration and deterioration, it can not be used, can only be discarded. The texture of the cosmetic itself can be viewed directly when purchased. If the hoard is too long after the deterioration, the texture of cosmetics will become very thin, out of water, and even the phenomenon of water and oil separation.
Most cosmetics contain starch, proteins and fats, and if left too long, microorganisms will multiply and break down these proteins and fats, destroying the original emulsification state of cosmetics and leading to cosmetics "out of water".
Expanded information:
Other phenomena of eye cream deterioration:
Because of the cosmetics are often in contact with the outside world, they are more susceptible to the infection of the external bacteria. . It may spoil within its shelf life, so check the texture of the eye cream and compare it with the previous one; new eye creams are generally thicker and expired products will show layering and thinning.
Look for deposits and aggregates. Eye creams that are within their shelf life have no or very little deposits. In special cases (e.g., a small amount of sediment is allowed), the cosmetic will be clearly labeled.
Smell the odor, the shelf life of the product smell is generally very fresh, expired eye cream due to bacterial contamination, due to bacterial decomposition and so on will cause changes in the smell of the eye cream, or even odor