Which salt should I use to make the homemade nasal rinse recipe?

You can use table salt to make a homemade nasal douche recipe. The recipe typically includes 2 teaspoons of salt, 1/2 teaspoon of baking soda, and 4 cups of boiled and cooled water. It is recommended to use the mixture within 24 hours if kept in a sealed container, or within 7 days if stored in the refrigerator.