It's been 22 days since I put 7 eggs into my Brinsea mini advance incubator. This is my first time trying to hatch eggs. Temp is set correctly along with all other settings. I candled the eggs every few days and they consistently looked the same. However, I know my eggs are fertile. I made sure half the reservoir was full for the first 18 days. After that I filled both sides with water. What could have gone wrong?