Making nasal saline solution at home requires three ingredients: water, non-iodized salt, and optionally baking soda. The standard recipe is 2 level teaspoons of non-iodized salt per quart (about 1 liter) of distilled or previously boiled water. The most important safety rule is never using plain tap water, which can contain harmful organisms that are dangerous when introduced directly into your nasal passages.
The Basic Recipe
Start with 1 quart of distilled water (available at any grocery store) or water you’ve boiled and cooled. Add 2 level teaspoons of non-iodized salt, such as pickling salt or canning salt. Stir or shake until the salt dissolves completely. If the solution stings or feels harsh, add 1 level teaspoon of pure baking soda (sodium bicarbonate), which acts as a buffer and makes the rinse more comfortable.
This ratio produces a solution close to isotonic, meaning it roughly matches the salt concentration of your body’s own fluids. Some people find they tolerate a slightly saltier mix. You can increase the salt up to 3 level teaspoons per quart if the standard amount doesn’t feel right, though it’s best to start with the lower amount and adjust from there.
Why the Type of Salt Matters
Use non-iodized salt only. Table salt contains iodine and anti-caking agents that can irritate the delicate lining inside your nose. Pickling salt, canning salt, and pure sea salt (without additives) all work well. Check the label: the only ingredient should be sodium chloride.
Making Your Water Safe
Tap water is safe to drink but not safe to put directly into your sinuses. It can harbor a rare but dangerous amoeba called Naegleria fowleri, along with other microorganisms that your stomach acid would kill but your nasal tissue cannot fight off. You have three safe options:
- Distilled water: Sold in jugs at pharmacies and grocery stores. Ready to use as-is.
- Boiled water: Bring tap water to a rolling boil for 1 minute, then let it cool to lukewarm before mixing. If you live at elevations above 6,500 feet, boil for 3 minutes instead.
- Filtered water: Water passed through a filter rated at 0.2 microns or smaller, or through a reverse osmosis system.
Isotonic vs. Hypertonic: Which to Use
An isotonic solution (0.9% salt, roughly that 2-teaspoon recipe) matches your body’s natural salt balance. It’s gentle, comfortable for daily use, and effective for general congestion, allergies, and keeping your sinuses moist.
A hypertonic solution contains more salt, typically around 3% concentration. You can approximate this by using the full 3 teaspoons of salt per quart. The extra salt pulls water out of swollen nasal tissue through osmosis, which reduces puffiness and thins out thick mucus more aggressively than a standard rinse. Research comparing the two in patients with chronic sinus problems found that hypertonic saline produced greater improvement in symptom scores and healthier-looking sinus tissue over time. Hypertonic rinses can sting more, though, so they’re better suited for short-term use when you’re particularly congested rather than as an everyday habit.
How Saline Rinsing Actually Works
Your nasal passages are lined with tiny hair-like structures called cilia that sweep mucus toward your throat in a coordinated wave. When you’re sick or dealing with allergies, that mucus gets thick and sticky, and the cilia slow down. Flushing with saline thins the mucus and physically washes out irritants, allergens, and bacteria. The gentle pressure of the rinse also stimulates the cilia to beat faster, restoring your nose’s natural self-cleaning system. Hypertonic saline takes this a step further by drawing extra moisture from swollen cells into the nasal passage, rehydrating dried-out mucus so it moves more freely.
How to Store Your Solution
Homemade saline stays good at room temperature for up to 3 days. Keep it in a clean, sealed container. After 3 days, dump whatever is left and make a fresh batch. If the solution looks cloudy or has particles floating in it before that, discard it immediately.
Keeping Your Rinse Device Clean
Whether you use a neti pot, squeeze bottle, or bulb syringe, cleaning it after every use prevents bacteria and mold from building up inside. Rinse all parts with safe water (distilled, boiled, or filtered) right after you finish. Then wash everything with a few drops of dish soap or baby shampoo, squeeze the soapy water through the tube and cap, and rinse thoroughly until no soap remains. Set the pieces on a clean paper towel to air dry completely. For squeeze bottles, you can microwave the disassembled bottle, cap, and straw for about 40 seconds as an extra disinfection step.
Replace plastic squeeze bottles every few months, since scratches in the plastic can harbor bacteria even after washing. Ceramic neti pots last longer but should still be inspected for cracks or residue buildup.
Tips for a Comfortable Rinse
Use lukewarm water, not cold and not hot. Cold solution hitting your sinuses is startling and can cause a headache. Lean forward over a sink with your head tilted slightly to one side. Breathe through your mouth the entire time. Pour or squeeze the solution gently into your upper nostril and let it drain out the lower one. Switch sides and repeat. If water drains into your throat, tilt your head forward a bit more.
A mild burning sensation usually means the salt ratio is off. Try adding baking soda or reducing the salt slightly. If your ears feel full or plugged during the rinse, you’re using too much pressure. Ease up and let gravity do more of the work. Avoid rinsing if you currently have an ear infection, as the fluid pressure can push water toward your ear canal and worsen the problem.