I have a Genesis too. My first hatch I watched it, Temp fluctuated but since the instructions said to trust it I left that alone. The humidity I went by the advice in PP mag and kept it near 35% until day 16. Then elevated it to 55% and then on day 18, 65%. Out of 32 eggs, of which 26 were shipped I got 6 EE's not shipped and 7 of the 26 shipped eggs. Since the eggs were shipped I thought that was good. They were packaged excellently.
Someone mentioned a cracked egg? I recently had one that I thought had a small crack? I took a white candle and rubbed it along the crack. Not sure which it was but it hatched and I now have a cute EE chick.
If you have a fax on your printer I can send you a copy of the information from the PP mag.
So the next hatch? Out of 23 eggs. Dels, CM and bantam friz. I got 20 live hatches. One of each breed failed to hatch. The hatch started 2 days early and lasted 4 days. Temp fluctuated from 98.7 to 100.0. Humidity went down into the 20's up into the 40's but for the last lockdown days I monitored it to the 65%.
So what's my point? There is a lot of advice on this forum but you have to find what works for you. If I fax you the article tried to follow all the advice as best you can. But for shipped eggs if you get 25%? Consider that good. Honestly I think folks are messing with the incu, opening and closing it. Candleing to much. Not monitoring the temps and humidity ever time they open the darn thing. Candleing once should be enough and never open it to add water.
All the best
Rancher (pm your fax number and I'll try to send the article)