Review on Premium 8 Inch Nylon Tube Brush Set - 12 Piece Assorted Variety Pack by Lisa Rice

The reviewer who said they were only good for gently erasing something that is essentially already loose and hardly needs cleaning is dead wrong in my opinion. Opinion, even though it's nylon, they're tough. I definitely think it can be used to clean things listed in the item description. Of course, they're not stainless steel or any metal. If you think you need it, get another set. I think they will do a great job with things that react to stiff nylon.