I'm going to have to look into this more. I'm part of "The Los Angeles Urban Chicken Enthusiasts" but they only hold educational meetings it seems. I joined because I was hoping they'd have swaps.
In regards to your temp Emi... I had the thermometer on my Brinsea staying put at 99.5 but my little digital hydrometer was bouncing around from 98.8 to 99.3. I have no idea which one was actually accurate. But if the hydrometer was right then the low temp worked well for me. Maybe try the cooling thing too? After the first week, my brinsea would turn it's heater off for 1 - 2 hours and the temp would drop to the 80's, even 70's sometimes. They said it results in a better hatch rate.
In regards to your temp Emi... I had the thermometer on my Brinsea staying put at 99.5 but my little digital hydrometer was bouncing around from 98.8 to 99.3. I have no idea which one was actually accurate. But if the hydrometer was right then the low temp worked well for me. Maybe try the cooling thing too? After the first week, my brinsea would turn it's heater off for 1 - 2 hours and the temp would drop to the 80's, even 70's sometimes. They said it results in a better hatch rate.