To prevent Belgian waffles from sticking, follow these tips:
1. Grease the waffle iron with cooking spray or melted butter before adding the batter.
2. Ensure the waffle iron is preheated to the proper temperature.
3. Avoid opening the waffle iron too soon; wait until the waffle is cooked through.
4. Use a non-stick waffle iron or apply a thin layer of oil to the iron if necessary.
5. Allow the waffles to cool slightly before removing them to prevent sticking.