Add these frequently overlooked high-touch surfaces to your cleaning routine during cold and flu season.Credit: Brie GoldmanCold and flu season in the U.S. starts in October and peaks between December and February. During this time, the Centers for Disease Control and Prevention (CDC) estimates that 9.4 million to 51 million people will get the flu.The flu is highly contagious, as are minor head colds, but you can take steps to protect yourself …