Step 3 - Add Dr. Pepper
Turn the heat down to low, remove the lid and pour 1 bottle/can of Dr. Pepper over the ribs. Then squeeze enough Sweet Baby Ray's BBQ sauce to completely cover the rack of ribs - about 2/3 of the bottle. Replace the lid and cook on low for 6 ½ hours.
Turn oven broiler on high. Turn off slow cooker and unplug. Using tongs or a large slotted spoon, carefully remove ribs from and place them on a foil-lined baking sheet. Discard juice from slow cooker. Coat/cover the ribs generously with the remaining Sweet Baby Ray's BBQ sauce. Place them under the broiler for about 3-5 minutes, or long enough to create a nice crisp outer layer and to help carmelize the sauce. Watch carefully not to char or burn!