Litsea Cubeba on Laundry: Keep the Oil Away From Dryer Heat

The decision comes first: if the oil will touch fabric that is going into a hot dryer, do not do it. Every dryer manual and fire source I read warns about oil left on laundry and heat, and none of them tested essential oils, so the cautious answer is to scent laundry after it has finished drying, away from heat. Litsea cubeba is lemon-bright and strong, which makes a few drops enough for a drawer or a linen shelf. It is not an ingredient to add to the dryer drum.

Litsea Cubeba Essential Oil bottle

Litsea Cubeba Essential Oil

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What the warnings say, and which oils they mean

The clearest manufacturer text I could read in full is the safety section of Samsung's gas and electric dryer user manual (document DC68-03170J, 2016). It says not to use the dryer on clothes with traces of "any flammable substance, such as vegetable oil, cooking oil, machine oil, flammable chemicals, thinner." It then explains the mechanism: heat from the dryer lets an oxidation reaction occur in the oil, oxidation creates heat, and if the heat cannot escape the items can become hot enough to catch fire. Washing in hot water with extra detergent "will reduce, but not eliminate, the hazard." It adds to use the cool-down cycle, never remove such items hot, and never pile them while hot.

The City of Madison Fire Department's release of April 6, 2009 describes a real case: towels soiled with cooking oils and grease, a fire that investigators attributed to spontaneous combustion of oily rags in the dryer, an estimated 150 thousand dollars in damage, and no injuries. Its advice for clothing soiled with volatile substances such as cooking oils: wash more than once, preferably hang to dry, otherwise use the lowest heat with a cool-down period, and do not leave dried clothes in the dryer or piled in a basket.

Notice what both sources are about: vegetable and cooking oil. Neither is about essential oil, and I found no dryer manufacturer or fire authority that tested an essential oil on fabric. The nearest statement is from an insurer. The loss-control page Avoid Fires from Massage Oils from Great American Insurance Group (undated) describes a fitness-centre fire that started when sheets with massage oils went into a dryer, and says many essential oils, including tea tree, lavender and citrus oils, are Class 3 flammable liquids with flash points of 122 to 140 F. It advises washing oil-soaked linens at 104 F or higher, drying below 125 F and not stacking. That page is a business risk bulletin, not a test, and its flash points are for the oils it names. We publish no flash point for our oil, so I cannot give you one.

My reading, labelled as reasoning: the manual mechanism (oil oxidising on fabric while heat is trapped) is documented for vegetable oil, the insurer's warning extends it to essential oils without data, and no source shows that a few drops of a volatile terpene oil are harmless in a drum. Absent that evidence, the dryer is the wrong place for the oil. For scale, the US Fire Administration's report on residential clothes dryer fires for 2008 to 2010 counted an estimated 2,900 fires a year, with 5 deaths, 100 injuries and 35 million dollars in property loss annually.

Three routes, in the order I would choose them

  1. Scent the dry laundry, away from heat. Put 2 to 3 drops on a cotton pad or a small piece of plain cloth, let it sit in the drawer, linen cupboard or closet, and keep it from touching clothes directly. Fabric never sees dryer heat with the oil on it, and a pad can be swapped for a fresh one.
  2. Air-dry anything that got oil in the wash. If you add drops to the wash or rinse, the oil sits on fibres that are then wet and, in reasoning, not reliably removed; the manuals say even washed oily items can still ignite. Hang those loads to dry, as the Madison release suggests for volatile soils.
  3. Dryer balls and heat: I would skip it. The popular advice is a few drops on a wool ball in the dryer. I found no manual or fire source that approves it, and the insurer's warning about essential oils in dryers points the other way. If you do it anyway, the dryer's own manual overrides anything written here, and the insurer's low-heat, no-stacking rules are the minimum.

Dryer balls, wool or otherwise, are not something we sell; a supply shop or grocery sells them. The same goes for cotton pads and any sachet cloth.

The arithmetic, if you scent a drawer

The COA we publish gives a relative density of 0.883 for the batch it covers, so 1 ml is about 0.883 g. At about 20 drops per ml (droppers vary; weigh instead), one drop is about 44 mg.

Staining and skin

Two points are reasoning, not findings. Neat essential oil is not water-soluble, so a drop that touches cloth can leave a darker mark, particularly on a pale or delicate fabric; test a hidden hem before trusting any cloth near the oil. And citral is a recognised skin sensitiser: our own safety copy says to keep dilutions modest and trial a small area first. Fabric held against skin all day is a leave-on exposure. In the IFRA guidance (51st Amendment, 30 June 2023), machine laundry detergent with skin contact sits in Category 10A, while dryer sheets and fabric softener sheets sit in Category 12, non-skin-contact products. Those are categories for industry fragrance work, they show that regulators of fragrance treat rinsed-off detergent and a sheet in the drum differently, and they do not give a safe amount for a home pad.

If you react to a scented garment, stop using the oil on laundry and see a dermatologist or physician. Keep the oil and any pads away from children and pets; in a poisoning emergency in the US, Poison Help (poison.org) is 1-800-222-1222, described on its site as free, expert and confidential.

What we recommend

We recommend not putting litsea cubeba on anything that goes into a dryer, and we make no claim that it cleans, deodorises or freshens fabric. It is a fragrance material sold neat, and the maths and the choice of method are yours. For other household uses see 15 ideas for home and craft, and for a sprayable scent that never goes near a dryer see the room spray. The planned odor eliminator article covers closets and bins, and skin basics covers the patch test.

A drawer pad is the lowest-effort way to try the scent, and the shop page lists the current sizes.

Litsea Cubeba Essential Oil bottle

Litsea Cubeba Essential Oil

Litsea Cubeba Essential Oil from our own shop, in sizes from 0.5 oz to bulk.

From $12.99

Shop Now →

Sources & Further Reading