âA cold egg left out at room temperature can sweat, facilitating the movement of bacteria into the egg and increasing the growth of bacteria. Refrigerated eggs should not be left out more than two hours.â. Consumers themselves should not try to wash their eggs, the USDA warns.onât purchase cracked eggs; bacteria can enter eggs through cracks in the shell. â Make sure the eggs have been refrigerated in the store; bacteria can multiply quickly when eggs are left at room temperature. â If you are purchasing egg products or substitutes, check to make sure containers are well sealed.