The skin of unwashed, organic apples is teeming with microscopic organisms — tiny yeasts and bacteria that feed off the natural sugars in apple cider and turn it into a bubbly, sparkling, sweet-and-tart glass of fall flavor! No need to add sugar or spices!
If you're using a cider press, you don't even have to worry about stray leaves or sticks because they'll be filtered out. As long as you're sure your apples are organic and have never been sprayed with anything, you don't even need to wash them first!
If you're using a juicer, remove leaves and sticks before juicing, but don't worry about the skins, stems, or peels. Whether using a cider press or juicer, there won't be any leaves, seeds, or stems in the finished cider.
the fresh-pressed cider to swing-top bottles or quart-size jars and close. Leave on your countertop for 2 to 4 days. (You can go longer, but the cider will lose most of its sweetness and become slightly alcoholic the longer it ferments.)
Spontaneously Fermented Sparkling Apple Cider https://traditionalcookingschool.com/food-preparation/recipes/spontaneously-fermented-apple-cider/