does humidity go up when your bator is VERY full?

[chkinut]

Each egg loses 10-13% weight through the course of incubation, it's all water. The more eggs the more vapor is coming from them. You can cover part of your water tray, say 1/3 of well covered with saran wrap or foil to lower the water surface area. This would lower your humidity by 10%.

thank you! i may have to try that.