Two years ago I had a mild sinus infection. I decided to use the neti pot hoping to prevent a bad infection. Unfortunately, the neti pot made things worse and my mild infection turned into a really bad one. I eventually had to use antibiotics after 2 months of major headaches, earaches and toothaches. I think the neti is useful for hygiene and prevention when infection is not present, but if there is an infection it could make things worse. Just my 2 cents!