Sculpt brush problem

Hi! I want to sculpt some stitches on a model I’ve made. Just as they do in this Zbrush video at 1:16. The problem is that I can’t get the brush to rotate properly along my stroke. Here’s how it looked when I tried to make a simple spiral real quick:


I am guessing that I might need to use the smooth stroke but that lags so much that it is unworkable.

What should I do?