To prepare the ribs, wash them and remove the membrane on the back.
(Some ribs will already have the membrane removed).
Mix all the spice rub ingredients - salt, pepper, garlic powder, onion powder, paprika, oregano, cumin, and brown sugar.
Stir well to combine everything.
Add the spice rub to the ribs on both side.
Cover with plastic wrap and place in the fridge for a minimum of 4 hours. Overnight is best.
Remove ribs from the fridge.
Add trivet to the bottom of the Instant Pot.
Mix apple juice, water, apple cider vinegar, and liquid smoke in a container.
Add the liquid mixture to the Instant Pot.
Arrange the ribs around the rim of the Instant Pot.
(If the ribs are already cut, place standing up).
Close the lid. Move valve to SEALING
Pressure cook on Manual at High Pressure for 16-25 minutes.
For tender but still meaty ribs, 16 minutes.
For falling off the bone ribs, 25 minutes.
The Instant Pot will beep when finished. Allow natural release for 5 minutes.
Then move valve to VENTING to release the rest of the pressure.
Open the lid carefully.
Remove the ribs from the Instant Pot and place on a foil-lined cookie sheet.
Brush the ribs with your favorite BBQ sauce on both sides.
Heat the broiler.
Place the ribs in the oven for 5 minutes.
(You can also do this on the grill).
Remove from oven. Let cool for 4-5 minutes before slicing.
Enjoy!