Clay Bar Use: What am I doing?

[BAVARIAN323i]

WHne i use it it comes up with little black spots....but the paint doesnt look much different. I usual yhave these spots by the sideskirt....but when i "nead" the clay the dirt in the clay doesnt go away, so how do you guys clay the whole car without rubbing the dirt you pick up over the paint again?

[G. P. Burdell]

When I knead the clay, I fold it over on itself enough times to expose a fresh surface. The way I do it is kind of hard to describe. I roll it into a rope, double it, twist it, roll it back into a ball, and repeat until the surface is clean. I do this before starting a new ~2'x2' section.

If you pick up any bits of grit, pluck them out of the clay before continuing. And if you drop the clay on the ground, discard it and start with a fresh piece.