The nylon brushes do a great job cleaning the grill plates and do not scratch or chip the finish on the metal.
Grillbot - Stainless Steel Replacement Grill Brushes
We like our Grillbot so much we bought 3 more for our kids. Also ordered the nylon bristles and they work better than the brass ones.
As soon as she opens it at Christmas and uses it, we will get back to you,