Is Universal Cleaner fragrance-free?Updated a day ago
TL;DR: Universal Cleaner has no added fragrance. No perfumes, no masking agents, no essential oils. You may notice a very mild scent from the two ingredients themselves, nothing perfumed. If you prefer a scent, add 2 to 3 drops of essential oil to your spray bottle. Lemon Scented Tea Tree Oil is formulated for exactly this. More than a few drops can interfere with the atomiser spray mechanism.
Is Universal Cleaner scented?
✓ Fragrance-free by design
No added perfumes, no essential oils, no masking agents, no dyes. Fragrance is the most common trigger in a cleaning product, and the simplest way to leave it out is to have only two ingredients in the first place.
You may notice a very mild scent from the ingredients themselves. That is normal, it is not perfume, and it fades as the surface dries. Leaving fragrance out is part of why Universal Cleaner is Allergy UK certified, Sensitive Choice approved, recognised by the Eczema Association of Australasia and Good Environmental Choice Australia (GECA) certified.
Can I add a scent to Universal Cleaner?
Koh's own blend, formulated to pair with the alkaline formula and dosed for a typical atomiser fill. Fresh citrus scent, and a few drops scents a full bottle.
⚠ Keep it to 2 to 3 drops
Too much essential oil can cause the internal dip tube inside the Atomiser Spray Bottle to slip off the nozzle, which stops the bottle spraying properly. Two to three drops per fill, swirled gently, and you're fine.
Lavender, eucalyptus and peppermint work too. Worth knowing: once you add oil, that bottle is no longer fragrance-free, so keep an unscented bottle as well if someone in the house is fragrance-sensitive.
What if my atomiser stops spraying after I add oil?
✓ Quick fix
Unscrew the spray head from the bottle.
Check the small plastic tube inside. Press it firmly back onto the base of the nozzle if it has come loose.
Rinse and dilute if needed. If the tube is oily, rinse the head under warm water, dry it, and reattach. Top the bottle up with fresh Universal Cleaner to dilute.
From then on, 2 to 3 drops per fill keeps it clear.
GECA certified, Allergy UK certified, Sensitive Choice approved, Eczema Association of Australasia recognised. No added fragrance, two ingredients, used undiluted, made in Australia.
Koh's own essential oil blend, formulated to pair with Universal Cleaner. Two to three drops scents a full atomiser.
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Last reviewed: September 2026 · Koh Australia