To clean your lettuce, remove any discolored or wilted leaves from the outside of the lettuce head and then cut the lettuce into wedges and run water over each wedge while holding the lettuce together. Add the wedges into a salad spinner with the wedges on their sides. Genly spin the lettuce so that the water can drip from the lettuce. Gently pat each wedge with paper towels. Once cleaned and dried, carefully cut the core out using a paring knife.