Light a charcoal fire in a covered grill and set it up for indirect grilling: When the temperature reaches 225°, carefully push the hot coals to one side and place a drip pan filled with 1 cup of water on the opposite side. Alternatively, bring a smoker to 225°. Put the ribs on the grill over the drip pan, overlapping them slightly, and cover the grill; you'll need to cook the ribs for about 4 hours total, or until the meat pulls away from the bones and is very tender. Maintain the temperature at 225° by replenishing the charcoal with a fresh batch of burning coals every hour. Every hour, drain 1/2 cup of the wood chips and scatter them over the hot coals. Add water to the drip pan when half of it is evaporated. After 1 1/2 hours, spray the baby back ribs with the Cider Mop Spray and rotate them on the grill; repeat spraying every 45 minutes.