Mine got foggy in the beginning. I now have the vent plugs half in and the RH and temp are steady. I am also using a hot air humidifier in the room it is in to help out with the dry air in my house. I will be gone for 32 hours tomorrow and I want to be sure that the RH wont drop too much when I am gone. Also my mom is going to come by on Friday to check on the babies for me before I get home. I think she just wants to watch them hatch and coo over them.