Prepare 5 to 6 (one for each potato) square pieces of aluminum foil, large enough to wrap potatoes tightly.
Wrap foil tightly around potato. Place in slow cooker. Repeat with remaining potatoes.
Add 1/2 cup of water to slow cooker. Set on LOW to cook for 7 to 8 hours or on HIGH to cook for 4 to 5 hours.
When done, remove potatoes from slow cooker using kitchen tongs. Place on plate. Unwrap, slice lengthwise with a knife, fluff with fork and top with your favorite toppings: butter, more seasoning, sour cream, dill, parsley, bacon, cheese.