My girlfriend had a series of sinus infections that no antibiotic would touch. Her ENT doc suggested surgery to which she responded,"No way." So, instead, he suggested that she rinse with a saline solution. It took a long time but she finally drained her sinuses. The doc confessed that he rinsed with a saline solution every day in winter so that he did not get contaminated with his patients' infections. She continues to rinse (sort of snort up) the saline solutions during our winter months....and has never had another problem.