How to Switch Scents in a Nebulizing Diffuser Without Mixing Them

Changing scents in a scent machine is easy once you know the order: run it down, clean the path, and give the room a day. A step-by-step guide.

One of the pleasures of a scent machine is changing the scent with the season or the mood. One of the frustrations is pouring a new oil in and finding the old one still hanging around. Here is how to make a clean change.

Why scents linger

A nebulizing (waterless) diffuser turns oil into a very fine mist. A little of each oil stays in the reservoir, the tubing and the atomiser. If you top up a half-full bottle with a different scent, you will be smelling a blend for days. Sometimes that blend is pleasant. Usually it is muddy.

The clean way to switch

Run the current oil down. Let the machine use what is in the reservoir rather than pouring it away. If you want to keep it, carefully pour it back into its original amber bottle and cap it tightly.
Wipe the reservoir. With the machine unplugged, wipe the inside of the reservoir and around the opening with a lint-free cloth.
Follow your machine's own cleaning advice. Many manufacturers recommend running a small amount of cleaning solution through the atomiser between scents. Use only what your manufacturer recommends, and let everything dry fully.
Fill with the new scent. Pour slowly, to the recommended line, not to the brim.
Run a short cycle and wait. Give the room 12 to 24 hours. Fabrics and soft furnishings hold the old scent for a little while, and your nose needs time to reset too.

Choosing scents that change gracefully

If you switch often, move between scents that share a family. Going from Thé Blanc to Grand Foyer is gentle, because both are fresh and luminous. Going from a fresh citrus to a deep leather such as Cèdre Noir is a bigger jump, so it is worth a full clean in between.

A natural rhythm for many homes:

Spring and summer: Thé Blanc or Grand Foyer.
Autumn: Ambre Safran or Santal Vellum.
Winter and the holidays: Cèdre Noir or Velours Rose.

Signs your machine needs a proper clean

The mist is weaker than usual at the same settings.
The scent smells slightly "off" or flat.
You notice residue around the atomiser.

These are often signs of an oil that is too thick for the machine, rather than a fault. Oils made for scent machines run clean. More in Why Diffuser Oil Clogs Scent Machines.

Trying before you switch

If you are not sure what to move to next, The Complete Hotel Edit has all six of our scents as 5 ml samples. Run one at a time for a day or two before choosing your next full bottle.

Quick answers

Can I mix two fragrance oils in a scent machine? You can, but results are unpredictable and the blend changes as it runs. We suggest choosing one well-composed scent at a time.

Do I need to clean my diffuser between scents? For similar scents a wipe is usually enough. For very different scents, follow your manufacturer's cleaning advice.

How long does the old scent take to fade? Usually 12 to 24 hours in the room, a little longer in soft furnishings.

Our signature scent: Thé Blanc, white tea, ginger and soft musk. It is the scent most guests ask about first, and the one we suggest when you are not sure where to begin.

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