How to Clean Your Diffuser: A Step-by-Step Guide

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Aromatherapy diffusers are a fantastic way to create a soothing and relaxing atmosphere in your home while benefiting from the wellness properties of essential oils. Whether you're using a traditional ultrasonic diffuser or a waterless diffuser, regular cleaning is essential to ensure your diffuser functions optimally.

In this guide, we'll walk you through the steps of how to clean your diffuser effectively, ensuring it stays in tip-top condition.

Why Clean Your Diffuser?

Before we dive into the cleaning process, let's take a moment to understand why cleaning your diffuser is crucial. Over time, essential oils and water residue can build up inside your diffuser, leading to a few potential issues:

Reduced Efficiency: A dirty diffuser may not disperse essential oils as effectively, diminishing their therapeutic benefits.

Aromatherapy Blending: Residual oils from previous uses can affect the scent of your diffuser's current blend, resulting in unwanted combinations. While can be painful to clean your diffuser every time you change blends (and it’s totally up to you if you don’t), it can help to keep aromas true to the blend.

Mould and Bacteria Growth: Stagnant water and oils can become breeding grounds for mould and bacteria.

Shortened Lifespan: Neglecting to clean your diffuser can lead to wear and tear, shortening its lifespan.

How often should you clean your diffuser?

We recommend doing a maintenance clean after you’ve used your diffuser 5-6 times or for 2-3 days, or after a long period of not using. If you have a smaller/ compact diffuser, you may need to clean more often – every 2-3 uses.

As mentioned above, you can also clean in between changing blends.


Step 1: Unplug from power

Safety first! Before cleaning your diffuser, disconnect the AC adapter from the power supply. Take off the cover while keeping the unit stable. Disconnect the DC plug from the unit.

Step 2: Empty the diffuser

Carefully pour out any remaining water and essential oil mixture from the reservoir. Pour it out from the drain side, not the air outlet side or water may get into the unit.

Step 3: Clean

Note: this applies to most Bosisto’s Diffusers (Ultrasonic, Tranquility, Compact Stone, Compact Onyx, Serenity, Harmony) but not our Simply Oil Waterless Diffuser. For cleaning instructions for our Simply Oil Diffuser, download operating manual here.

a) Use a damp cloth or cotton bud with water or diluted mild kitchen detergent to clean the ultrasonic mechanism and machine body.

b) Do not use chlorine, acidic or enzyme-based detergents to clean the outside or inside of the unit. For high oil buildup, a cotton bud dipped in rubbing alcohol may be used.

c) IMPORTANT: DO NOT press heavily or scratch the ultrasonic mechanism in the water tank during cleaning.

Step 4: Clean the mist outlet

If there is any dirt or oil residue around the mist outlet, clean with a cotton bud dipped in diluted soapy water or rubbing alcohol.

Step 5: Wipe down the exterior

Using a soft, damp cloth or a microfiber cloth, gently wipe down the exterior of your diffuser. This will help remove any dust, dirt, or oil residue that may have accumulated on the surface.

Step 6: Run a cleaning cycle

After the unit is all clean, fill with water, install the cover and run (without essential oils) for 30 minutes. Empty out the cleaning water and it’s ready to use again.

If you’re putting it away in storage, ensure the diffuser is dry and there's no residual moisture before reassembling.

Extra tips!
To keep your diffuser in optimal condition, consider these tips:

  • Only use pure essential oils, diffuser oils and essential oil blends in your diffuser. Using synthetic fragrances, oil ‘Solutions’ or Vaporiser inhalants may cause damage and will generally void your warranty.

  • Don’t use too much essential oil – 6-9 drops is standard and more isn’t always better. Too much will clog the system and may be overwhelming as the aroma builds. Add less to start – you can always add more!

  • Always place your diffuser on a stable surface and prevent knocking or tipping it while it contains water – it can cause water to leak into the unit and cause issues.

  • Use a cup, or a small jug with a spout to add water to the unit for better control - don’t put it under a tap.  This helps prevent parts getting wet that shouldn’t.

Cleaning your aromatherapy diffuser is a simple yet essential task to ensure that it continues to provide you with the soothing and aromatic experience you love.

By following these step-by-step instructions and practicing regular maintenance, you'll not only extend the lifespan of your diffuser but also ensure that you can fully enjoy the benefits of essential oils in your home.

A clean diffuser means a fresh and delightful aromatic experience every time you use it, promoting relaxation and well-being in your daily life. So, don't forget to make cleaning your diffuser a part of your routine. Happy diffusing!