Pat the ribs dry with paper towels
Turn the ribs bone-side up
Slide a butter knife or dull knife under the membrane at one end of the rack
Lift the membrane enough to grip it with a paper towel
Pull the membrane off in one piece if possible
If it tears, start again at an edge and continue pulling
Use the paper towel for a better grip
Trim any remaining bits of membrane with a knife if needed
Rinse your hands and discard the membrane