Prepare the Crock Pot. Place a large slow cooker liner or use a slow cooker bag to make cleanup a breeze. Alternatively, coat the crock pot with non-stick cooking spray.
Score the Ham. With a sharp knife, score the surface of the ham in a diamond pattern. This allows the delicious glaze to penetrate the meat, infusing it with flavor.
Mix the Glaze. In a mixing bowl, combine the brown sugar, pure maple syrup, Dijon mustard, pineapple juice, orange juice, ground cloves, and ground cinnamon. Whisk the ingredients until the glaze is smooth and well blended.
Glaze the Ham. Place the scored ham in the crock pot, and generously brush the glaze all over the surface of the ham. Ensure the glaze reaches into the scored cuts for optimal flavor.
Slow Cook to Perfection. Cover the crock pot with its lid and set it to low heat. Let the ham cook for 4 to 6 hours, basting it occasionally with the glaze from the bottom of the crock pot.
Garnish and Serve. Once the cooking time is complete, remove the ham from the crock pot and place it on a serving platter.
Reduce the Glaze. Transfer the remaining glaze from the crock pot into a saucepan. Bring it to a simmer over medium heat and let it reduce until it thickens slightly.
Glaze the Ham Again. Brush the reduced glaze over the ham one more time, giving it an irresistible shine and a final burst of flavor.
Slice and Enjoy. Slice the ham and serve it alongside your favorite sides.