4. Learning to increase humidity in a chicken incubator. Both the high humidity egg and low humidity egg would have difficulty hatching. For information about how to do this, see the section above on "Humidity Control". I believe that low humidity is caused by high temperatures which dry out the water trays in the incubator and help the humidity in the atmosphere evaporate. Leave the incubator closed until after the chicks hatch. During the last three days (the "lock-down" period), the humidity level should be increased to between 70-80%. To increase the humidity levels in an incubator you can: * add a jar or tray of water * add a wet towel. I believe that low humidity is caused by high temperatures which dry out the water trays in the incubator and help the humidity in the atmosphere evaporate. If levels are low, then there are adverse effects on the hatching of eggs. Increase the humidity level in the incubator. Add more water or a sponge to the water pan to increase the humidity. It is vital for poultry farmers to have an idea of the ideal humidity in their machines. If you wish to increase the humidity levels in the incubator then add more water to the water trays in the incubator. Around day 19, when the first chicks could potentially start to pip, it’s time to raise the humidity in your incubator to 65% or more. But the music is sweeter to a few farmers who have laid hold on smart incubators. Here's an image to show how an egg should look at day 18 with proper incubator humidity. Obviously you don't want that to happen either. If the humidity in the incubator is too low and too much moisture is lost, the chick will be too small and weak to hatch. Second: you need to increase the humidity level in your incubator. This helps the hatching process to go well. To get closer to 100 % RH you need to increase the surface area of water in contact with the atmosphere inside the incubator. Moreover, a great many of modern incubators regulate their humidity by either facilitating the decrease of the increase of the ventilation thus decreasing or increasing the level of air change in the incubator. High humidity during hatch is essential to lubricate your chicks as they do the hard work of wiggling around, pecking their way out of their shells. High humidity also affects the process negatively. You want the humidity level to be at 65%.