Ok, so I have purchased BBs a few times now, and I have yet to remove the membrane. I have looked but never did find anything that resembled the membrane from all the pictures I have seen. All the BBs I have bought up till now have been fresh in a Styrofoam tray. After cooking, there is no sign of a membrane either. I guess I am trying to figure out if the membrane is easy to spot if it is still on the ribs. Any advice would be appreciated. I bought my first cryovac BBs a couple of days ago. When I flipped them over, they didn't appear to have a membrane either. These are the Swift brand from Costco. Anybody know if the membrane is removed from these before packaging? Also noticed a strong smell when first opening the package, I understand that can be normal as long as it goes away after a few minutes.