1. Avoiding overcooking: Cook the eggs for the right amount of time (usually about 9-12 minutes for hard-boiled eggs, depending on the size).
2. Cooling quickly: After boiling, place the eggs in ice-cold water or run cold water over them to stop the cooking process.
3. Cooking at a lower temperature: You can also try to cook eggs at a gentler simmer rather than a full rolling boil.

These steps help prevent the conditions that cause the green ring and keep your eggs looking and tasting their best!