Razer Mamba wireless Wheel

Hello! The reason for this post is because I want to know if there is a "safe" way to open my Mamba mouse. Since yesterday, I have been feeling that there is something wrong with the wheel, times it is working totally fine, but some times... well, is a little bit hard to explain, if I try to scroll up 3 rows, it scroll down 1 and then scrolls the 4 rows (the one that it scrolled down plus the 3 that I tried to scroll up, same if I try to scroll down). I down really know if this happens because it is being damaged or if there is some trash inside it and that is why is not reading well the information, don't know what it could be, I just purchase it in January, so I don't believe or at least it is really hard to me believe that it is started to be damaged, so, is there a way to open it? So I can be able to discard if there is something inside making it acting like this