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…
Does it work on commercial products with ziplock ? That always tears for me
It works pretty well. You’re applying opposite sideways forces to the zipper itself rather than pulling on the plastic film of the bag.
Edit: if you want to be sure you don’t blow out the corner of the bag, pinch it with your other hand before sliding your thumb towards it