I have three different makeup pencil sharpeners from various brands but none of them seem to work! 
The tip of my eyebrow pencil breaks off inside the sharpener and I end up sharpening it about five times before it works, by which time I've lost alot of pencil and the tip is never sharp.
This happens on my eyeliners too.
The pencil I am trying to sharpen today is No7 Beautiful brows pencil. It's so frustrating, what am I doing wrong?

The tip of my eyebrow pencil breaks off inside the sharpener and I end up sharpening it about five times before it works, by which time I've lost alot of pencil and the tip is never sharp.
This happens on my eyeliners too.
The pencil I am trying to sharpen today is No7 Beautiful brows pencil. It's so frustrating, what am I doing wrong?
I've tried stealing others since but I get the same problem.