A few years back management here took away the brushes (without explanation) and gave us the grill stone. The men were very upset. But after using the stone that one Saturday, they were happy. I would have to assume it was all about the bristles coming out of the brush. To the men, it just didn't seem very manly to use a stone for cleaning. Nothing like a good hard brushing to get anything clean. One of the guys suggested that they soak the grills in an engine cleaning solution. That idea got shot down real fast.
We women have to laugh at the men here. They think women know nothing about grilling. Only men know how to do it right. Blah, blah, blah. They were sorry they opened their mouth by the time we got done with them.