Here are a few tips for storing Fertile Chicken Eggs.
Any cracked or overly dirty eggs should be removed and not stored as these impurities reduce the chance of a healthy chicken hatching. These eggs also increase the chance of spreading infection to other eggs that may be in the incubator. Do not try to wash any dirty eggs as this can do more damage than good.
Any fertilized egg should be gathered immediately, and placed in proper storage. Ideally fertilized eggs should make their way into an incubator as soon as possible to reduce the risk of spoiling eggs. Be sure to start your incubator 24 hours before placing fertilized eggs inside to ensure the proper temperatures.
Once a chicken egg is fertile it is very important to keep the egg at the right temperature. If the temperature is too cold then the chick may die. Some recommend keeping fertilized chicken eggs in a cool dry place, other suggest keeping the fertilized chicken eggs wrapped in a towel to maintain warmth. It is very important to not change the temperatures too fast or drastically as this will reduce the chances of the eggs properly hatching.