Wash orange, cut into 8 slices, and add to slow-cooker.
Pour water into the slow cooker and turn on low for about 6-8 hours. See notes for 1-hour Instant Pot option! I use my Instant Pot on the slow cooker option since I prefer to make this before bed and have it ready (and the house smelling incredible) for breakfast.
Strain out apples, orange, and spices using cheesecloth or a fine mesh strainer and serve.
Serve hot or cold. Keep refrigerated for up to one week if there's any left!1-Hour Instant Pot Option: