To a medium mixing bowl, add the BBQ sauce, minced garlic, and salt. Mix to combine. Pour half of the sauce into the slow cooker.
Add the ribs into the crock pot in sections. I prefer to put them in with the bones standing up for even distribution of sauce and tenderness. (You do not have to remove the membrane off the back.)
Pour the remaining sauce over top of the ribs. Cover and cook on LOW for 8 hours (see notes).
Once cooked, remove the ribs from the slow cooker and place them on a baking sheet lined with foil. Set aside. (see notes)
Ladle some of the BBQ sauce in the crock into a small saucepan and bring to a boil over high heat. Reduce the heat but keep a fast boil for about 2 minutes until thickened. Spoon the fat off the top and place the sauce in a small bowl to serve with the ribs.
Place an oven rack in the top position. Then set your oven to broil. Place the baking sheet with the ribs on the top rack and broil for 1-2 minutes or until lightly charred. (keep an eye on things so the ribs don't burn!)
Serve the ribs an large sections, cut into smaller sections, or into individual bones before serving warm with the dipping sauce.
Notes
I find that 8 hours on LOW is perfect. If you want fall-off-the-bone ribs, you can cook them for 9-10 hours.
I do not recommend cooking the ribs on HIGH for 4-5 hours, regardless of what other websites say. They are too tough... low and slow is the way to go.
You don't have to broil the ribs once they're done cooking. I like to broil them for a little char and texture. You can serve them with the dipping sauce directly from the slow cooker.