I like Polypropylene because it clear to see the cookies but it rip easily, the material apparently preserve better than polyethylene. On the other hand, I like polyethylene for durability that they don't rip easily but got a bit of a cloudy look to the bag. My current bags is polypropylene 1.2m thickness which I heat sealed them as well. I noticed once customers open the bags it can be a bit difficult to maintain the bag's integrity and hard to prevent the bag falling apart. what should I do?