Aluminum foil
1/2 cup water
3 to 4 pound ham
liquid smoke (optional)
Pour 1/2 cup water in Crock-Pot. Wrap precooked 3 to 4 pound ham in foil, place in Crock-Pot. Cover and cook on High 1 hour, then Low 6 to 7 hours or until ham is hot. If desired, sprinkle ham with liquid smoke before wrapping in foil.
If cooking larger ham, cook 1 hour on high then low 8 to 10 hours.