I just tried this in my bathroom sink. It works every time. Wrap your striker or knife in toilet paper or any type of tissue, wool, paper, and use it to strike your fire steel.
I used my Bark river Aurora.
http://www.youtube.com/watch?v=gqJi8coXzq4
I used my Bark river Aurora.
http://www.youtube.com/watch?v=gqJi8coXzq4