Why is my mouse always breaking?

Why is my mouse always breaking?

I just bought a new travel mouse for my laptop this past month and already it's stopped working. I was always worried the mouse cord would snap as it's so thin. However, it did not break. It just stopped working. This is at least the third mo use I have purchased so far this year. I don't think that I'm really rough with the mouse so I don't know why they just stop working.