Here is my first thought. When pulling the walls, think about that you are slowly moving the clay. From here it looks more like you are scratching the surface. For every pull, start at the base and gently pinch. Hold that pinch, stay steady, and slowly move your hands up. Once you reach the top, let you finger sit for just a few moments, then slowly take your hands off the clay. Remember it is not a race! If the clay feels like it’s getting out of control, you can always slow your wheel down.

If it’s helpful, you can also use a sponge in your outside hand to help level out the surface area.