Dry or dusty environments are horrible for your voice. If you notice that your studio is a dry or dusty area, leave a window open to freshen the air or invest in a humidifier. Taking a hot shower can be a great way to warm and loosen your vocal cords before a broadcast. Note that clearing your throat can be harsh on your vocal cords, so try to drink lots of water and/or take a hot shower if your throat feels scratchy.