I have a Brinsea 20 with an attached humidifier. I ran my incubator for the first 18 days at a temp of 99.8. Humidity at 35. At 18 days, I increased my humidity to 70. I had one hatch out of 12. I was told that with too much humidity the membrane is too rubbery for the chicks to pip through. I had large air sacs, but intact membranes. I don't want sticky chicks, but I want them to hatch! Do you think that this time I should reduce the humidity to 60 during lockdown? Thanks for any help that you can give me on my BCM's.