Not unless its manual says so: use only the water your steamer's manufacturer specifies. In the manuals and product pages we read for seven steam inhalers from five brands (checked October 11, 2026), none tells you to put saline in the main water tank, and the two that name saline keep it out of the tank that heats. The voice studies that used saline delivered it with nebulizers, a different device.

What steamer manuals say about saline

Steam inhaler Water its documents specify On saline
Vicks Personal Steam Inhaler V1200 Tap water, and water only Not named in the manual, which warns that adding anything to the water may create an unsafe condition. The product page says adding anything may cause a malfunction and will void the warranty.
MyPurMist Free, 2 and Classic The company's sterile water; the Classic also accepts distilled water Not named. The Free guide says any other water, additive or liquid will damage the device and void the warranty.
Crane EE-5948 Cordless Steam Inhaler Clean drinking or spring water; not distilled or purified water Not named. The manual says not to add medication of any type to the water reservoir.
MABIS Steam Inhaler 40-741-000 Nothing except water in the water heater tank Named. Saline or aromatherapy water may go in a separate aromatherapy tank.
Veridian HealthWise Steam Inhaler 59-525 No additives in the heating tank Named. The manual says "Never add saline, essential oils or other additives to the heating tank" because it will damage the unit. The product page points to a secondary fill tank for saline water; the manual's step for that tank names tap or distilled water.

The Vicks documents were read from Internet Archive captures dated May 19, 2024 and November 13, 2025, because the Vicks site could not be opened on October 11, 2026.

If your steamer is not listed, use only the water its manual specifies (how to use a vocal steamer has the general steps). No manual or product page we read names home-mixed salt water as such; the water-only and no-additive wording in the table is what covers it.

Fingers twisting the tab off a small clear plastic vial above a table

Where the saline idea comes from

The voice studies we cite tested saline as a nebulized mist, not in a steamer. A nebulizer turns a liquid into a cool mist without heating it. Three small lab studies by Tanner and colleagues nebulized saline after a period of breathing dry air, and in the first no nebulized treatment significantly sped recovery.

Study Who and what Result
Tanner et al., 2007 60 vocally healthy women; 15 minutes of dry air, then nebulized isotonic (0.9%) saline, hypertonic saline, sterile water or no treatment No nebulized treatment significantly enhanced recovery of phonation threshold pressure (PTP), a lab pressure measure. Isotonic saline showed a temporary trend toward lower PTP.
Tanner et al., 2010 34 classically trained sopranos; 15 minutes of dry air, then nebulized isotonic saline, sterile water or no treatment Perceived phonatory effort returned to baseline only after isotonic saline; PTP did not change significantly.
Tanner et al., 2016 10 male trained singers and 10 nonsingers; 30 minutes of dry air, then nebulized 0.9% saline Self-rated effort and dryness improved; no consistent change in PTP or the acoustic measure.

None of these outcomes measures how well anyone sang. We found no study that put saline in a steamer, so the results do not carry over to one: a steamer gives off steam, which is water vapor, while these studies delivered the saline itself as a mist.

Steam's own studies are small and their results vary: in Keltz & McHenry (2022, 12 women), 3 of 7 analyzed participants strongly disliked it. See Does steam help vocal cords? and our research library.

If you want saline mist, you need a nebulizer

A nebulizer mists the liquid in its cup, and you breathe it through a mouthpiece or a mask. Before you use one with saline:

  • Use sterile saline labeled for inhalation or nebulizer use. Salt stirred into tap water is neither.
  • We give no amounts or schedules. Follow the saline's label and the nebulizer's manual; anything prescribed goes in only as your doctor directs.
  • Saline is a separate purchase. Kits from Mayluck, a brand sold by the company that owns this site, include no saline or medicine, for example.

Mayluck sells rechargeable mesh nebulizers such as the MY139, and its help center has a page on what can go in a Mayluck nebulizer.

A nebulizer is a purchase, saline is a repeat purchase, and the saline studies include a null result. If you like your steamer, keep using it.

When to stop and see a doctor

If steam or mist makes you cough, stop and ask a doctor. The NIDCD says to see a doctor if you have been hoarse for more than three weeks (especially without a cold or flu), are coughing up blood, have trouble swallowing or breathing, feel a lump in your neck, have pain when speaking or swallowing, or lose your voice completely for more than a few days.

Questions

What can you put in a vocal steamer?

In the main water tank, only the water its manual specifies, and that differs by model: tap water for the Vicks V1200, the company's sterile water for the MyPurMist Free and 2, clean drinking or spring water for the Crane EE-5948. None of the manuals in the table above tells you to add saline, medicine or oils to that tank; the MABIS manual allows saline or aromatherapy water only in its separate aromatherapy tank.

Is there a vocal steam nebulizer?

The phrase joins two devices: a steamer makes warm water vapor, and a nebulizer makes a cool mist with no steam. The Crane EE-5948 has a warm steam mode and a cool mist mode, and its manual still calls for clean drinking or spring water. Vocal steamer vs. nebulizer compares the two.

Can you make a saline solution for a vocal steamer with salt and water?

No manual we read names home-mixed salt water, but several rule it out of the main tank in broader words. The Vicks V1200 manual says to use water only and warns that adding anything may create an unsafe condition, the MyPurMist Free guide says any other water, additive or liquid will damage the device, and the Veridian manual says never to add saline to the heating tank. The three NHS voice leaflets we read that say what goes in the water are not instructions for an electric steamer (St George's describes a bowl of hot water, West Suffolk a steam-inhaling mug) and differ on oils: St George's (written for head and neck cancer patients) says plain water with no oils, Royal Berkshire says nothing needs to be added, and West Suffolk allows 2 to 3 drops of Olbas or tea tree oil only with a cold or throat infection.

Sources