Preheat the oven to 350 degrees F. Wash and dry the potatoes and do not poke each potato once or twice with a fork. Again, do not poke any holes in the potato. Potatoes only explode when they are over cooked. Pour the vegetable oil into a small dish and dip a paper towel into the oil. Rub the oil all over each potato. Place the potatoes on a baking sheet. Sprinkle salt over the potatoes. Bake about 1 hour. Check the potatoes for doneness by inserting a fork into one. If it presses through easily, the potato has completed cooking.