I’ve noticed that every product I’ve bought in the past year with a zip-lock seal is destroyed with common use. I actually think the zip-lock itself has gotten stronger. The bag rips before the seal opens on half the bags now and whenever I try to opens bags I had no issues with before, I find myself stretching/warping the plastic before the seal eventually opens.
It’s pretty frustrating and I am seeing it across many products. Cheese bags, storage bags, snacks etc…
I sometimes get fresh tortillas from the grocery store bakery, and the bags they use are the absolute worst. The zip-locks are fine, but the plastic the bag is made of is so thin that it can’t withstand the pressure needed to open the zipper, inevitably tearing the bag open and defeating the entire purpose of the zip-lock.
Put your thumbnail in between the middle of the ziplock and pry it open from the middle.