If you have a Death Adder and you are like me then you have noticed that underneth the m4 m5 buttons the surface is quite slick and after awhile your fingers start to slip.. Also on the other side of the mouse where your ring finger or pinky rest is the same deal.. After looking at Razer's wireless mamba and putting my had on it I noticed that they fix the issue with the rubbery texture on both sides of the mouse.. However im not going to drop 120$ on a mouse just for a nicer feel so I have came up with a way to fix my issue.. Might not be your issue but I figured that I would share.. What you do is go to your local headshop or skate shop and pick you up a piece of skaters grip tape and then well I think you will figure it out but here are some images of mine.. Total cost is like 6 to 8 bucks and you will have plenty left.

Doesn't skategrip destroy your fingers pretty quick?

I think better could be some tennis style grip which absorbs sweat too.. or icehockey grip

Actually I havent had any problems out of it.. but like I said what works for me may not work for you to each their own...I was just putitng the idea out.

That could work, but I agree with rlx, somekinda sticky grip would be better.