By Kay Quinn
KSDK - Two deaths in Louisiana are leading to warnings for anyone who uses water to flush their sinuses.
Neti pots and other devices can help clean impurities from the nasal passages. But experts say tap water should never be used.
Dr. Mark Levine, an emergency room physician at Barnes-Jewish Hospital in St. Louis, joined us live on Google Plus to explain it all.
Click on the video player to watch.
KSDK