Death Adder Elite Mouse

Hi Guys, I am using the Death Adder Elite mouse and the Firefly hard mat. This is my 2nd mouse of this kind and I am finding the material coming loose underneath. This seems to make a noise when I drag it accros the mat. I think I have had this one about 12 months. I am not complaning or anything. All I need to know if other Guys using the same kind of mouse had a similar problem. Also do they think I have had this one long enough and should be buying a new one asap.
Hope you can help.

All the best for now.

Widow