Rinse and pat dry the baby back ribs. Use s paper towel to grab and remove the membrane from the back of the ribs. T
Drizzle on both sides with olive oil and rub generously with the dry rub.
Spray the inside of a 6 quart oval slow cooker or similar with cooking spray. Arrange 1 rack of ribs along the wall of the slow cooker insert.
Arrange the second rack of ribs on the interior of the slow cooker.
Mix together the Dr Pepper and liquid smoke and carefully drizzle over the ribs. Make sure the lid covers snugly.
Cook on low for 7-8 hours or until fork tender. The ribs will become very tender, so, handle carefully.
Remove to a pan and cool uncovered.
After cooling, cover with plastic wrap and chill if making in advance.
To broil: Move the oven rack to the highest position and set on broil. Spritz a baking sheet liberally with cooking spray. Brush one side of the ribs with bbq sauce. Broil for approximately 4-5 minutes per side or until charred. Repeat with the other side. Rest uncovered for 5-10 minutes before serving.
To grill: Preheat the grill to medium. Liberally oil the grates. Brush one side of the ribs with bbq sauce and grill until charred, approximately 4-6 minutes per side. Repeat on the opposite side. Rest uncovered for 5-10 minutes before serving.