An audience member shows Oprah how to use a neti pot.

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Before you try pouring water into your nostril, Dr. Oz offers some neti pot pointers. First, mix warm water with a quarter teaspoon of non-iodized salt.

"You never want to wash [human] tissue without having saltwater in them," he says. "Your own cells like it more."

Dr. Oz says washing out your sinuses with regular water can be irritating. Cold water may make you feel like you're drowning in a pool.

Amy, an audience member who suffers from sinusitis, demonstrates the proper way to use a neti pot. "I thought it would feel like drowning, but it feels good," she says.

It may look strange, but Dr. Oz says this treatment may be more effective than medication. "The [ear, nose and throat] doctors who are specialists in this area will often say this is a better treatment than a lot of the other drugs that we try to offer folks, because it mechanically cleans out the problem," he says.

What were Amy's long-term effects of using a neti pot for her allergies?

Neti pots are available at health food stores and most drug stores.