Just before one of the biggest barbecue weekends of the year, the U.S. Consumer Product Safety Commission issued a recall for more than 1 million grill brushes. According to the notice, their small metal bristles can come loose and stick to grills and food, turning an everyday tool into a serious safety concern. What happened? On July 2, Conair began recalling 1.7 million Cuisinart grill brushes made with metal wire bristles. The company said it…