Here's some great reading on incubation:
https://www.backyardchickens.com/ar...incubator-thermometers-and-hygrometers.73634/
https://www.backyardchickens.com/articles/the-beginners-guide-to-incubation.73350/
https://www.backyardchickens.com/articles/incubation-humidity.73386/...