Fill a medium size pot with water and let then let the water come to a boil. Once it boils, add baking soda to it followed by cubed potatoes. Let the water come to a boil again after adding the potatoes and boil exactly for 1 minute. The remove the pot from heat and drain the potatoes using a colander. This extra-step of boiling the potatoes in alkaline water results in extra crispy potatoes. Transfer the potatoes to a kitchen towel and let them dry completely. You can pat them with kitchen towel so that they dry faster.