Sponges?

[cupman]

Before I set my eggs I found a quick YouTube video of a woman with my incubator model. She did a quick run down of what everything was and how it worked and briefly mentioned the incubation process. One thing I was unsure of was the addition of sponges during lockdown. The instructions that came with my incubator make no mention of adding sponges so I was just wondering if it's a good idea or not.

 

[tmoore8595]

The purpose of adding sponges is to increase the surface area if the water, and therefore increase the humidity. Adding sponges dramatically increases evaporation. You only need 35 to 45% humidity during the first 18 days but you need to increase it to 75 or 80% for the last three days.