To wash or not to wash? A nutritionist explains the dangers hidden in citrus peels. "You have to wash them. Because they are transported from other countries, dirt, dust and certain manufacturing particles may accumulate on the outside of oranges and tangerines. In addition, they are treated with various chemicals to make them last longer," nutritionist Anton Polyakov told aif.ru. Experts recommend using running water and also scrubbing the fruit with a clean brush, and if the skin is soft, with your hands. Citrus fruits can be scalded in boiling water. In this case, do not use soap or detergents: the skin of oranges and tangerines has a porous structure, so it will not be possible to completely wash off the remaining product. Read news I will now on MAX.