Whether you have barbecued ribs or plain, grilled ribs that you prepared ahead of time, you can use a slow cooker to warm the ribs so the meat is tender and ready for dinnertime. While warming your ribs in the oven or microwave can dry out the meat, ribs warmed in the slow cooker will be moist and tender.
Set up the slow cooker. If the ribs are plain with no barbecue sauce, add 1/3 cup of water to the bottom of the slow cooker. If the ribs are barbecued, add just enough water to cover the bottom of the cooker.
Use tongs to place each of the ribs in the slow cooker.
Plug the cooker into a power source. Place the cover on the slow cooker.
Set the slow cooker to warm. If the slow cooker does not have a warm setting, but only has high and low settings, set the cooker on low.
Warm the ribs on low heat for two to three hours. If the cooker is set to warm, leave the ribs in the cooker for four to six hours.