Is it hard to maintain the humidity at those levels here in AZ where low humidity is the norm?
I have a Rcom 20 that does a really good job at keeping the humidity and temperature regulated. I keep the temperature at 99.5* and humidity between 40-50% for the first 18 days and monitor progress diligently so I can make adjustments accordingly. Once the eggs go into lockdown I increase the humidity to 65-75% and drop the temperature by 0.5* per day.