The most effective way to clean your sinuses is nasal irrigation, which means flushing warm saline (saltwater) solution through your nasal passages to wash out mucus, allergens, and irritants. It works by thinning sticky mucus, rehydrating the nasal lining, and physically sweeping debris out of your sinuses. You can do it at home with inexpensive supplies, and the symptom relief is significant: studies on people with allergies show saline rinses reduce self-reported symptom severity by a large margin compared to doing nothing, with benefits lasting up to three months.
What You Need to Get Started
You have three main device options: a neti pot, a squeeze bottle, or a powered pulsating irrigator. A squeeze bottle is generally the best choice for most people. In cadaver studies comparing devices, squeeze bottles delivered significantly more saline into the maxillary sinuses (behind your cheekbones), frontal sinuses (behind your forehead), and sphenoid sinuses (deep behind your nose) than pulsating devices. The extra pressure you control with a squeeze gives better reach into sinus cavities. Neti pots use gravity alone, which makes them gentler but less thorough.
Beyond the device, you need non-iodized salt, baking soda, and safe water. That’s it.
How to Make the Saline Solution
The American Academy of Allergy, Asthma and Immunology recommends this recipe: mix 3 teaspoons of iodide-free salt with 1 teaspoon of baking soda and store the dry mixture in a small airtight container. When you’re ready to rinse, dissolve 1 teaspoon of that mixture into 8 ounces (1 cup) of lukewarm water. The baking soda buffers the solution so it doesn’t sting. If it still burns, use a little less of the dry mix. For children, use half a teaspoon of the mix in 4 ounces of water.
You can also buy premixed saline packets at most pharmacies, which takes the guesswork out entirely.
Isotonic vs. Hypertonic Solutions
A standard recipe at the ratio above produces a solution close to your body’s own salt concentration (isotonic). A saltier mix (hypertonic) draws extra water out of swollen nasal tissue through osmosis, which can reduce congestion more aggressively. A meta-analysis of nine studies covering 740 patients found hypertonic saline provided greater symptom relief than isotonic, particularly for people with rhinitis (nasal inflammation from allergies) and for children. High-volume rinses with hypertonic solution showed the strongest benefit.
The tradeoff: hypertonic solutions cause more minor side effects like temporary burning, stinging, or a feeling of ear fullness. If you’re new to sinus rinsing, start with the standard isotonic recipe and adjust from there. If you try a saltier mix, keep it under 3% concentration. Solutions above 5% salt actually showed no benefit over isotonic in the same analysis.
Water Safety Is Non-Negotiable
Never use tap water straight from the faucet. Rare but deadly brain-eating amoeba infections (caused by Naegleria fowleri) have been linked to sinus rinses made with unsterilized tap water. The CDC recommends one of these options:
- Boiled water: Bring water to a rolling boil for 1 minute, then let it cool to lukewarm. At elevations above 6,500 feet, boil for 3 minutes.
- Distilled water: Buy it by the gallon at any grocery store. This is the easiest option.
- Filtered water: If your water is cloudy, pre-filter it through a clean cloth, paper towel, or coffee filter before boiling.
This is the single most important safety step. The saline solution itself does not kill pathogens; only the water preparation does.
Step-by-Step Rinsing Technique
Lean over a sink and tilt your head forward about 45 degrees, turning it slightly to one side. Place the tip of your squeeze bottle or neti pot snugly against one nostril. Breathe through your mouth the entire time. Gently squeeze (or let gravity work with a neti pot) so the solution flows into one nostril, travels through your nasal passages, and drains out the other nostril or your mouth. Use about half the solution on each side.
After rinsing, gently blow your nose to clear out remaining fluid. Don’t blow hard, as this can push fluid into your ears. Some people feel a brief sensation of fullness or mild dripping for a few minutes afterward, which is normal.
The physical flow of liquid does more than just dissolve mucus. The pressure and movement across the nasal lining actually stimulate your cells to release fresh protective mucus, release fluid, and increase the beating action of tiny hair-like structures (cilia) that sweep debris toward your throat. So you’re not just washing passively; you’re kickstarting your nose’s own cleaning system.
How Often to Rinse
During an active cold, sinus infection, or allergy flare, rinsing once or twice daily is appropriate. According to Cleveland Clinic guidance, daily irrigation is safe as a long-term habit for people who want to prevent sinus infections or manage ongoing allergies, as long as you use properly prepared water and clean your equipment. Some people rinse a few times a week as maintenance rather than daily, which also works well.
There’s no hard upper limit that’s been established, but twice daily is the most commonly studied frequency. If your symptoms aren’t improving after a week or two of consistent rinsing, the issue may need a different approach.
Cleaning Your Equipment
After every use, rinse the bottle or neti pot with safe water (distilled or previously boiled) and let it air dry completely. Bacteria and mold can colonize a damp bottle quickly. Never share your rinse device with another person. Replace squeeze bottles every few months, or sooner if you notice discoloration or buildup that won’t wash away. Ceramic neti pots last longer but should still be inspected regularly for cracks where bacteria can hide.
Sinus Rinsing for Children
Nasal irrigation can be used in children over 6 months old, though the technique needs to be adapted. Younger infants lack the reliable oral breathing and cough reflexes needed to handle fluid in the nose safely. For babies and toddlers, small-volume saline sprays (about 6 milliliters per nostril) applied gently with a continuous spray device are the standard approach, with the child positioned on a slight incline with their head turned to the side.
Older children who can follow instructions can use a squeeze bottle with the half-strength recipe (half a teaspoon of the salt-baking soda mix in 4 ounces of water). Hypertonic solutions showed particularly strong symptom improvement in children under 18 in clinical studies, so a slightly saltier solution may help kids with chronic allergies or congestion, though you should start mild and watch for complaints of stinging.
Who Should Be Cautious
Children with ear tubes (tympanostomy tubes) need special care. If saline is delivered too fast (faster than about 1 milliliter per second), it can reach the middle ear through the tube and cause chronic ear drainage. If water comes out of your child’s ear during a rinse, that’s a warning sign to slow down, use smaller volumes, and apply very gentle pressure.
People with frequent nosebleeds, a severely deviated septum, or recent nasal surgery should check with their doctor before starting irrigation, as the pressure and fluid flow could aggravate these conditions. For everyone else, nasal irrigation has no reported major adverse effects across the clinical literature. The worst most people experience is mild, temporary stinging if the salt concentration is off.