Fresh eggs must be kept fresh in the refrigerator after they are bought back. However, we need to pay attention to two points to achieve the best preservation effect. First, do not clean before storage. Second, be sure to pile up upright with the big head up, not horizontally.

Don't wash it before storage, because there are many pores similar to skin pores and a thin film on the eggshell. If cleaned, it will destroy the membrane, but bacteria can easily enter the egg through pores, leading to deterioration of the egg; In addition, when you put the eggs in the container, be sure to pile them upright with their big heads up. The reason is that the newborn egg protein is evenly distributed, which can effectively fix the position of the yolk. However, with the extension of time and the increase of external temperature, under the action of protease, mucin contained in protein gradually dehydrated, which made protein gradually thin, and then made protein lose the function of fixing the yolk position.

Moreover, because the importance of egg yolk is not as important as that of protein, if the egg is placed horizontally, the egg yolk will float up and stick to the eggshell, forming "egg yolk" or "sticky preserved egg", which will affect the quality and taste. This will not happen if the eggs are stacked upright with their big heads up. Because there is an air chamber at the big end of the egg, even if the protein thins and the yolk floats, it will not stick to the eggshell.