What should I do if the oil turns black after frying food?

After the food is fried once, the debris on the food is easy to deposit on the bottom of the oil and become oil residue, and the oil will appear black when it is used again. In this case, the specific method is as follows:

1, put an egg shell in the oil tank, and the egg shell will absorb the black oil residue in the oil to make the oil clear;

2. The oil fried for many times turns black, which will produce carcinogenic components and cannot be reused.