I am sure the use of the neti pot is pretty new to a lot of us. I had never heard of it before the Oprah Winfrey show in early 2007. Even then the slang name "'nose bidet" was more memorable.
However, in many parts of the world nasal irrigation is pretty much a daily routine. We all brush our teeth at least daily- I hope. Jali neti ( nasal cleansing in sanskrit)is pretty much the same. It is a daily health and hygiene routine, like any other cleansing of the body. People in India and other places do this once a day in the morning. Some choose to perform the practice at the end of the day also, especially when congested or exposed to polluted environments.
See: nasal irrigation