Place the spiral sliced ham into the bottom of the slow cooker.
Mix together the honey and butter in a bowl, and pour between the slices and over the outside of the ham.
Cover and cook on high for 4 hours.
Preheat the broiler on high on your oven.
Blend together the garlic powder, cinnamon, nutmeg, ground cloves, paprika, garlic powder, salt and brown sugar in a bowl.
Remove half of the seasoning mixture, and sprinkle it all over the top of the ham.
Transfer the ham to a baking dish lined with aluminum foil.
Broil the ham for a few minutes until caramelized.
Heat the remaining seasoning mixture in a pot over medium heat until melted and thickened slightly.
Brush the glaze over the ham and broil for another minute or two before serving.