I am doing ribs for the family (specifically my 6 year old niece requested them) this weekend and figured I would ask about what is probably the most frustrating part of prepping them: taking off the membrane on the back. I use a sharp knife to try and get under the membrane and then use a paper towel to get a grip on it (if I can get the membrane loosened). For some racks it comes off easy, others I literally can't get the membrane off.
Any special tricks/techniques I should try? How many people just leave them on?