Take all of the ingredients except the ham and mix together in a small bowl. Take 1/3 of the glaze and place in a separate smaller bowl. Set aside.
Take the rest of the glaze mixture and brush onto the ham and in between the spiral cut slices. Place ham into the slow cooker on high for 2 to 3 hours or on low for 4 to 5 hours. (If your ham is pretty big like mine, you might need to fold down the slices so the slow cooker lid fits.)
Turn your oven broiler on. Remove from slow cooker and put into an oven-safe dish and add the remaining reserved glaze to the ham. Place under broiler in your oven for 3 to 4 minutes and then serve. (Be careful to not let your ham burn.)
Notes
I modified this recipe from Maille for the slow cooker.