diff --git a/Ploopy-Nano-Trackball-Kit-Assembly.md b/Ploopy-Nano-Trackball-Kit-Assembly.md
index d507377..d55dae5 100644
--- a/Ploopy-Nano-Trackball-Kit-Assembly.md
+++ b/Ploopy-Nano-Trackball-Kit-Assembly.md
@@ -98,6 +98,14 @@ At the end, all of your bearings should look like this.
 
 **TODO photo of friction pads on base**
 
+## Step X: Remove a bit of shine from the ball
+
+**TODO photo of ball being rubbed in hands**
+
+- If the ball is too shiny, the sensor isn't going to pick up a lot of the detail on the ball
+- Therefore, in order to make the Ploopy Nano function better, you'll have to remove a bit of the shine on the ball
+- Rub the ball in your own hands for about two minutes, and you'll be done
+
 ## Step X: Insert the ball
 
 **TODO photo of ball in top**