“The USDA requires producers to wash eggs with warm water at least 20°F warmer than the internal temperature of the eggs and at a minimum of 90°F. A detergent that won’t impart any foreign odors to the eggs must also be used. After washing, the eggs must be rinsed with a warm water spray containing a chemical sanitizer to remove any remaining bacteria. They are then dried to remove excess moisture.
This last step is crucial because bacteria cannot penetrate a thoroughly dry egg shell. Add a thin layer of moisture, however, and not only is there a medium that promotes bacterial growth, but the water also provides an excellent vehicle for pathogens such as salmonella and other critters to pass through via the tens of thousands of pores on the surface of the egg shell.”
“Should you wash eggs?
It’s not necessary or recommended for consumers to wash eggs and may actually increase the risk of contamination because the wash water can be “sucked” into the egg through the pores in the shell When the chicken lays the egg, a protective coating is put on the outside by the hen. Government regulations require that USDA-graded eggs be carefully washed and sanitized using only compounds meeting FDA regulations for processing foods.”