Mine wasn't bad....but with time the slider does tend to loosen a bit. Here's what I tried and it worked....Of course be very careful, I take no responsibility for anyone elses actions.

Open the battery door. Hold the side edges in the area you have the looseness, and apply slight pressure to the sides on the bottom slider area. Enough pressure to shift the sides in, not too much for the device to break though....may take a couple of tries.

I did it and my slider is tighter than when I got it.

Good luck.