I'm trying to increase my goose flock by incubating eggs, but my hatch rates are consistently low, despite using what I believe is a properly functioning incubator. I'm maintaining the correct temperature and humidity according to the incubator's instructions, but a significant percentage of my eggs fail to hatch. What are the common reasons for low goose egg hatch rates, and how can I improve my success?

I need detailed instructions on every aspect of goose egg incubation, including selecting fertile eggs, proper egg storage before incubation, optimal turning frequency and techniques, humidity management throughout the incubation period, and recognizing and addressing potential problems during incubation. Guidance on candling eggs to assess their viability and identifying signs of embryonic mortality would be particularly valuable.