Poke potatoes a few times with a fork, rub with oil and sprinkle with salt.
Wrap each potato in a square sheet of aluminum foil — place in the bottom of the slow cooker.
Cook on HIGH for 4-5 hours - or LOW for 7-8, or until fork tender whichever comes first.
Carefully unwrap potatoes, slice in half with a knife, fluff, and top with desired toppings.
