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’ve noticed this on zip top food packaging; it’s as if the zipper is a separate piece of plastic that is very weakly glued to the bag itself and it doesn’t extend to the outer lips where you pull it open, so you end up separating one side of the bag from the zipper.