Small Angled White Shader,.. right? This is my favorite for contouring the crease, I usually dust it off by hitting it against my hand or the edge of something hard and then apply color to crease,.... start soft and then build.
I brush it very lightly against the e/s and sometimes will tap it on the back of my hand. I use it horizontaly, but I have big eyes, so if you don't you might try using just the corner of it to get in your crease.