Maybe it's your bowl. Is your bowl old? Have you tried a different bowl?
Peggy

"shipwreck" > wrote in message
...
> When I rub a spatula against the inside of my KitchenAid mixng bowl
> (dry) this black stuff winds up on the rubber. It smells metalic.
> It can't be the spatula. It happens on all 4 of them (different
> spatulas).
>
> What could this be? It happens when rubbed vigerously, but still, it
> happens.
>
> Thx