- Feb 16, 2012
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Yes. The fan does seem to wick away the humidity. I added some plastic tubing & through which I add water daily. I like to "dry incubate" so I aim for about 30-35% for 18 days, then I triple the water's surface area, add sponges, & whatever other tricks I can think of to get the humidity as high as it can go for days 18-21. (As high as I can get it is about 60-65% humidity.) Day 18 is the hardest because when I change the humidity, the temp changes on me. I always plan to be nearby, so I can check the temps every 30-60 min. If after the hatch you are finding well developed chicks that are getting shrink wrapped inside the shell, it could be low humidity near the end.
If you notice temp fluctuations because the room temp may be varied (near a door, window, or using a styrofoam incubator) I read that several people wrap the whole incubator in a blanket/towel - especially along the seams & viewing windows. Another thing you could try is adding heat sinks. (water bottles or cleaned rocks) Just anything to absorb the heat so that when the incubator gets opened & closed, the temp get back up to normal faster. I do this when I have a small number of eggs in a large incubator.
I do not have fluctuations in my incubator. I also do a dry incubation which it naturally stays around 30-40 in my stillair incubator. So, I didn't think being at 20-25 humidity would ruin them? And I also bring humidity up to 60 at 18-21 days. The last batch did look shrink wraped.