In USA people have a replace mentality, if something is not working and cheap, you can replace it. I was this close to ordering a new mouse on amazon when I thought let me shake it to see if something is stuck, but nothing came out. I then saw a small screw in bottom, I unscrew it and I hit the jackpot, I was like wth "Lint". My friend had similar issues with Lint in Iphone5 when his iphone wont charge and we used a breadtie to get out the lint and it was charging fine.
I was like yay problem solved and now mouse is working like new again.