Problem with physic

Hello everyone, I’ve made a sphere with balls inside with a part to mix them.

But The balls are not mixed like i want…

The situation :

The script to move the mixer part :

while wait() do
	script.Parent.CFrame = script.Parent.CFrame * CFrame.Angles(math.rad(1), 0, 0)

Are the balls anchored?
Does the mixing part have collisions enabled?

Balls are unchored and the mixer have collision. But I’ve seen the balls mixed only if i’m near of it