Why must I change my NeilMed bottle every three months? I rinse it after every use and clean it periodically.

We recommend replacing the Sinus Rinse or NasaFlo Neti Pot every 3 months because this is the recommendation that has been established by medical studies to reduce the risk of contamination. This is similar to changing a tooth brush every few months for hygiene purposes.https://www.neilmed.com/usa/disinfection-protocol/