I've had this pair of S4's for about 9 months now and I've noticed that the driver flex is getting worse and worse as time goes on.
During the first couple months of owning, I would only experience it when I first pop them in my ears to get a snug and sealed fit. Now, when even they are just lightly fitted into my ears, every single minute adjustment makes the drivers crackle and pop. I've always used a gentle touch when putting them in my ears for fear of ruining the drivers.
Is this normal behavior for the S4's?