I have a story about my Smart Keyboard Folio that might be worth relating here. After 4 or so months I started to notice I wrinkling on the case. Subtle at first then more pronounced. It occurred in places where the folio touched my skin. Which was most of the case on the bottom where it might touch my legs or where my hands would often touch on the backside when I adjusted the angles or was hand holding the iPad. It got worse. Over the summer the wrinkling began to bubble up along the hinge and then started to flake off. By the fall the entire length of the hinge was flaking off in pieces. It still functioned but looked terrible and the hinge had become very loose feeling. Something you might expect a fabric hinge to do after a year of use.
I took it to the Apple Store in St. Louis and they replaced it. My theory was that the wrinkling was caused by interaction with the oil of my skin. The Apple staff person suggested it could have also been heat. By this time 80% of the cover was intensely wrinkled. It almost looked like a kind of leather. When not in use it was on my desk. When in transport it went into a cushioned sleeve. It was very well and constantly used but taken care of.
In my case I think it was very obvious that some sort of chemistry was going on. I don’t know how wide spread the issue is and I’m glad they replaced it. I think it was clear that I had not abused it but that something strange was happening. Do you see any wrinkling? Anyone else seen this?
One last thought, I think an item that is heavily used is going to show signs of use. If it’s minor and the item is still working well, I would just keep using it. I used mine for a full year and when I finally took it in it looked terrible. I’ll see if I can find the images of the hinge flaking off. Edit to note that at the point I exchanged I could see the underlying material where the connections in the hinges are. Which is to say that in my case it was not a minor cosmetic thing.