They have periodically changed the towel over the years based on feedback from customers. My wife was a tester about 7-ish years ago when they last tweaked things. I recall, at the time, they were looking at possibly coming out with a light duty version of the rags in a box. (We tried that out, but I remember it not being that much better than a regular paper towel.)
You should write them a letter. I'm sure they would appreciate the feedback and may even send you some product.
I just stocked up and haven't noticed a change.