Mix all the ingredients for the spice rub in a small bowl. Set aside. Rinse the ribs with cold water and pat dry.

Remove the silver skin from the back side of the ribs. Insert the tip of a sharp knife under the skin to get it started. The rest should pull off in one large piece.

To season ribs, sprinkle spice rub on each side and rub into the meat until well coated.

Add the water, apple cider vinegar, and liquid smoke to the bottom of the Instant Pot bowl. Insert the trivet into the bowl as well. Add the ribs to pot, curling them around to fit below the max fill line.

Seal the Instant Pot vent and cook on the Manual High setting for 35 minutes. Allow the steam to natural release. Add all the sauce ingredients to a medium size container. Whisk or blend everything together. A wide-mouth mason jar and immersion blender works well. Store the sauce in the fridge for at least 2 hours to allow the flavors to combine.

Preheat the grill to 450F. Grill the ribs on each side until they are a bit crispy and heated through, about 6 minutes per side.

Serve the ribs with the sauce.