I have a thread here on BYC: https://www.backyardchickens.com/t/...s-right-whos-wrong-no-one/15840#post_15727285 I started with fellow BYCer scflock, it's about peoples differences in how they hatch, but he is in the middle of doing a BCM hatch using a lower humidity because he was told the same after his first try yielded less than he would have liked. We have many knowledgeable people on the thread that would be more than happy to share their experiences with you. One of our girls used a carbon product I believe it was that she found at the dollar store to lower the humidity in her bator. I know it was working for a while, but I can't remember the overall outcome. You are more than welcome to join us over there and ask away. In between serious chicken discussions we do a lot of goofing off and get a little crazy, but we quickly shift gears to help others.
Have you checked either hygrometer for accuracy and do you know how to monitor your air cells for growth?
