Incubator humidity question

[TT43]

How do you raise the humidity in a still air incubator? My eggs are 9 days in and I'm just wanting to be prepared.

 

[hysop]

By adding water

 

[JaeG]

Exactly the same as in a forced air. Just remember it's the surface area of water exposed to air that affects humidity. The more water surface exposed the higher the humidity and that's why wet sponges work well.