scroll wheel is defective after a few months of use

This mouse has its pros and cons. Some pros are that you can change the speed of the cursor anytime by pressing the DPI button next to the scroll wheel, it feels very nice and comfortable in your hand, and the click pads have a nice click to them, and are easy and comfortable to press. It also has nice weight to it so its easy to move around. The cons though is that my scroll wheel started becoming defective after around 6 months. I can scroll down but when I try to scroll up, it does not work unless you move the wheel very slowly. Another con is that sometimes you can accidentally hit the back and forward buttons where your thumbs sit, which backs out of what your doing.

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