It starts the same way every year. You wake up with that familiar scratch in your throat. Your nose won't stop running. Your eyes feel like someone rubbed sandpaper on them. You reach for the antihistamines, maybe a nasal spray, and hope for the best.

But according to experts at Johns Hopkins Medicine, you might be missing one of the simplest, most effective tools in your allergy-fighting arsenal — and it costs pennies a day.

"The best defense against seasonal allergies" might not be what you think. According to Johns Hopkins All Children's pediatric emergency medicine physician Dr. Patrick Mularoni, saline nasal rinses are a go-to recommendation for patients dealing with persistent allergy symptoms.

Saline nasal rinses — sometimes called sinus rinses or nasal irrigation — use a saltwater solution to flush out the pollen, dust, and other allergens that have settled in your nasal passages. It is a surprisingly simple solution for a problem that makes millions of Americans miserable every spring and fall.

And the best part? You can do it at home in about five minutes.

What happens inside your nose during allergy season

To understand why nasal rinses work, you need to understand what happens inside your nose when allergies hit.

Seasonal allergies happen when your immune system overreacts to something harmless — pollen from trees, grass, or weeds. Your body releases histamine and other chemicals that cause inflammation in your nasal passages.

When that happens, the tiny hair-like structures called cilia that normally sweep mucus out of your sinuses get overwhelmed. They become sluggish. Mucus thickens and pools. And you end up feeling congested, stuffy, and miserable.

Here's where the rinse comes in.

"Washing the nose with saltwater helps to keep the nasal passages open and healthy by rinsing out thick or dried mucus," according to Children's Minnesota. It also "helps improve the function of cilia" — those tiny sweepers that clear your sinuses — and "helps prevent infection of the sinuses and reduce postnasal drip".

In plain English: you are literally washing the allergens out of your nose before they can make you sick.

How to do a saline nasal rinse (the right way)

A Johns Hopkins allergist recommends rinsing your nasal passages daily during allergy season, and the technique matters. Here is exactly how to do it.

What you will need

A sinus rinse bottle, Neti pot, or bulb syringe (available at any pharmacy for around $10-15)
Salt packets (sold with the rinse bottles) OR ingredients to make your own solution
Prepared water (more on this below)

These devices are widely available at stores like CVS, Walgreens, and Target. You can also order them online. The specific device matters less than finding one that works comfortably for you.

The most important rule: water safety

This is not optional. Never use plain tap water for nasal rinses.

Tap water contains trace amounts of bacteria and microorganisms. In most situations, your stomach acid kills them. But when you rinse your nasal passages, that water goes directly into your sinuses. Under rare circumstances — fewer than a dozen cases ever reported — contaminated tap water has been linked to serious brain infections.

The CDC guidelines are clear: use only distilled water, sterilized water, or tap water that has been boiled for at least one minute (three minutes at elevations above 6,500 feet) and cooled.

Do not rely on standard household water filters like Brita. They are not sufficient to remove all microorganisms.

Making the saline solution

If you buy a commercial sinus rinse kit, it will come with pre-measured salt packets. Follow the package instructions.

If you want to make your own, here is the recipe that Children's Wisconsin recommends:

¼ teaspoon of kosher or pickling salt (must be iodine‑free — iodized salt can be irritating)
¼ teaspoon baking soda
8 ounces (1 cup) of warm distilled or boiled water

The baking soda is important — it makes the solution less acidic and more comfortable for your nasal passages.

The rinsing technique

Stand over a sink. Lower your head forward at about a 45‑degree angle. Tilt your head slightly to one side.

Insert the tip of the rinse bottle or Neti pot into your upper nostril. Squeeze gently (or pour slowly). The saline solution should flow through your nasal passages and out the other nostril.

Breathe through your mouth the entire time. This prevents the solution from going down your throat and makes the process much more comfortable.

After you finish one side, gently blow your nose. Then repeat on the other side.

That's it. The whole process takes about two to three minutes once you get the hang of it.

When to rinse (and how often)

Dr. Alan Workman, a sinus specialist at Harvard-affiliated Massachusetts Eye and Ear, says once a day is often enough. "The time of day doesn't matter. I tell people to do it at whatever time fits best in their daily schedule," he told Harvard Health.

For most people, rinsing in the evening makes the most sense. You wash out all the pollen you have been breathing in all day, and you wake up with clearer nasal passages the next morning. Others prefer doing it in the morning as part of their shower routine — the sink catches any drips.

If your symptoms are severe, you can rinse more often. Research shows that patients with significant allergy symptoms can use nasal irrigation up to two to four times daily.

Expect a mild burning sensation the first few times you try it. Children's Minnesota notes that this is normal and most people get used to it quickly.

Does it actually work? Here is what the research says

Yes — and the evidence is strong enough that major medical institutions recommend it as a first-line treatment.

Johns Hopkins Medicine includes saline nasal rinses alongside antihistamines and prescription medications as effective tools for treating allergies.

Harvard Health reports that nasal rinses can reduce both symptom severity and the duration of a cold. For allergies specifically, the rinse works by washing away mucus and the chemicals that trigger inflammation, helping to reduce swelling in the nasal passages.

Natural Standard, a research group that evaluates natural therapies, concluded that "most research says yes" — saline nasal irrigation once daily can reduce common allergy symptoms like itching, sneezing, and runny nose. Patients with severe symptoms can use it three to four times daily for greater relief.

The rinse works by flushing out mucus and allergens, improving airflow, and often reducing the need for allergy medications. For people who tend to battle sinus infections, research shows that nasal irrigation reduces symptoms and the need for antibiotics.

Even for chronic sinusitis, doctors are beginning to use saline rinses as a delivery method for medications. "We can mix topical steroids or antibiotics into the rinse to treat persistent inflammation or infections," Dr. Workman told Harvard Health.

Keeping your equipment clean

This is the part most people mess up — and it matters for your safety.

After each use, rinse the bottle, cap, and tube with running water. Wash the bottle with hot soapy water or run it through the dishwasher. Rinse again with distilled or boiled water.

Let everything air dry on a clean paper towel.

If you use your rinse bottle daily, replace it every few months. The plastic can develop microscopic cracks that harbor bacteria.

Never share your rinse bottle with another person. This is not a communal device.

A word about children

If you are rinsing your child's nose, experts recommend starting with a saline spray first. A spray is just a mist that moistens the inside of the nose — it is not usually enough to treat significant congestion, but it helps children get used to the sensation of something going into their noses.

Once your child is comfortable with the spray, you can move up to full nasal saline rinses. Expect a mild burning sensation the first few times. Most children get used to the rinse after a few uses.

The bottom line

Seasonal allergies affect about one in four American adults. The standard approach — antihistamines, decongestants, and hiding indoors — works for some people. But for many, it is not enough.

A daily saline nasal rinse costs pennies. It takes less than five minutes. It has virtually no side effects when done correctly. And it works by physically removing allergens from your body before they can cause symptoms.

Johns Hopkins recommends it. Harvard recommends it. The evidence supports it.

So the next time allergy season hits and you reach for that box of tissues, consider reaching for a sinus rinse bottle instead. Your sinuses will thank you.

Seasonal allergies driving you crazy? A Johns Hopkins allergist recommends rinsing 1 thing daily