Note from Ricardo Oftentimes we remove the silver skin membrane found on the underside of the ribs. In this case, we leave it intact to keep the ribs from falling apart while they cook. The ribs can also be finished off in the oven under the broiler instead of on the barbecue. Remove the ribs from the slow cooker and place on a foil-lined baking sheet. Brush with barbecue sauce and place under the broiler for 5 to 6 minutes on each side or until nicely caramelized.