Pre-made saline packets are available over the counter, or can be homemade using the following ingredients. To mix daily: ¼ to ½ teaspoon table salt (adjust to your comfort, using less if it stings) plus ½ teaspoon baking soda added to a pint of warm water (water does not need to be sterile). To mix and store dry: 1 part salt and 1 part baking soda. When mixing with warm water, use ½ to 1 teaspoon of salt/baking soda mixture per cup of water.