Sorry that you have had problems with incubating the eggs.
Here are some handy tips to help achieve successful hatching, although I am sure that you are following all these tips.
* If keeping eggs prior to incubation then store in the correct conditions. http://farmingfriends.com/choosing-and-storing-eggs-before-incubation/
* Turn eggs regularly prior to and during incubation (turn eggs at least 3-4 times a day and remember no egg turning in the final three days of incubation). http://farmingfriends.com/final-day-of-egg-rotation-for-different-species-of-birds-eggs/
* Make sure eggs are stored and placed in the incubator with the small end facing down.
* Regularly check the temperature in the incubator.
* Try to maintain the correct temperature in the incubator at all times. http://farmingfriends.com/a-temperature-guide-for-different-species-of-birds-eggs-in-the-incubator/
* Regularly check the humidity in the incubator. http://farmingfriends.com/humidity-levels-for-egg-incubation/
* Try to maintain the correct humidity levels in the incubator at all time.
* Note that the required temperature and humidity levels are not the same throughout the whole of the incubation period.
* A wet bulb thermometer maybe a good purchase to help accurately measure the humidity and temperature levels in the incubator. http://farmingfriends.com/a-wet-bulb-thermometer/
* Check that the incubator is working correctly and has a constant temperature throughout the whole of the incubator.
* Make sure that there is ventilation in the incubator and incubation room, but avoiding drafts.
* Check breeding stock are healthy and free of infection and disease.
* Feed poultry on a healthy and balanced diet – commercial pellets usually provide the poultry with their dietary requirements and grass/green vegetables provide added vitamins and minerals.
* Ensure that the incubator is thoroughly cleaned and disinfected prior to use. http://farmingfriends.com/preparing-the-incubator-before-incubating-eggs/
Where do you get the eggs from? How old are the eggs before incubation, how old are the breeding stock, what is their diet?
Where do you store your incubator when in use?
Hope you have sorted out the incubating of your eggs.
sara @ farmingfriends