I've got this wireless mouse from Rapoo a few months ago. And 2 weeks ago it stopped working and I've still not fixed it. All of a sudden it stopped working. I suspected a bad battery. But I changed batteries several times now but all of them didn't work. I noticed the little red light does not turn on anymore. I tried to open it up but I can't seem to open it. There are a bit of corrosion on the battery terminal and it has since been there when I first got it. Pls help me 
