Nintendo New 3DSXL has a large area on the touch screen that won’t work?

So, as the title says my 3DSXL has a large area ( for the screen size anyways ) that just doesn’t work. For example, if I was using game notes, and I run the stylus down the left side of the screen, about 2/3 of the way it starts to make a hill that goes out about about an inch. Anybody got any solutions?