Remove the membrane from the back of the ribs and discard. Rub the dry rub all over the front and back of the ribs, making sure to completely cover them.
Mix the water, vinegar and liquid smoke in a cup, then pour in the Instant Pot. Place the wire rack inside and put the ribs on top of the rack, standing up.Lock the lid in place. Set the steam vent to "sealed".
Pressure cook for 30 minutes, then allow to release the stream naturally for 5 minutes, then quick release.
Place the ribs on a baking sheet and slather in your favorite Keto friendly barbecue sauce over the top. Broil for 5-7 minutes or until slightly caramelized.
Alternatively, you can finish the ribs off on the grill instead of broiling them.*Macros do not include BBQ sauce, so please adjust according to the sauce that you use.