you can mist eggs, if you have to mist the eggs then you have a problem. most likely your egg box is letting in air and humidity out. get some glad press n seal, not saran wrap, glad press n seal. one side is sticky. you can also place the lid over the press n seal to help hold it on. using the light grid works great, if the egg box is sealed. open it every week to let fresh air in and also to check on the eggs. about 10 days to 2 weeks, take the lid off and peel a corner back to make a small hole to let air in. at this point the eggs need more oxygen. once they pip remove the press n seal and place the lid on that has a few air holes in it, if they are needed (air holes). this way once they leave the egg they will not escape the egg box.