Instapot Fall off the Bone Ribs

I never thought ribs could be this fast and this delish.  I've been making  a lot of instapot recipes for a class I'm teaching at Relief Society and came across this one and it's a winner...really yummy and really fast (for ribs).  I tried baby back but also tried pork spareribs (which I might prefer). Both worked great, but make sure you cut the whitish clear membrane off the back of either set of ribs.  I found this kind of hard to do, so I just use a very sharp knife and scrape it off.  If you don't get it off, your ribs will be chewy.  

2-3 lbs. rack of baby back ribs (I used way more - a SAMS club size pkg. fit)
1 c. apple juice
1/2 to 1 c. apple cider vinegar (I liked 1/2 c.)
brush with liquid smoke
sprinkle with garlic powder
sprinkle with onion powder
1 jar of your favorite bbq sauce

Put a rack or trivet on the bottom of your instapot and roll the ribs up and place them inside.  Close the lid and turn on for 18 minutes.
After the timer goes off, let naturally release for 15 minutes then release any remaining pressure.
While the pressure is releasing turn the oven to broil.
Once the oven is ready, place the racks of ribs onto a cookie sheet covered with foil.  Liberally brush on your bbq sauce and place under the broiler for 5-7 minutes.