I feel your pain.
Since a TBI, I lost a lot of the strength and small motor in my hands and those foil seals on the PB, under the lid are impossible for me to grasp. I have needle nose pliers in the junk drawer to help with that.
I just run a knife around most of those liners. Same with pet food bags. I can never get the string thing to open on dog food and the glued end is impossible to rip by hand. Knives are wonderful things.