How do I add essential oils for scent?Updated 16 days ago
TL;DR: Essential oils can be added to most products for a subtle scent. 5 drops in laundry (in the fabric softener dispenser), 3 drops max in Universal Cleaner, foaming cleaners, or the Atomiser, and a few drops in the loo or in dish products. No citrus oils in the Foaming Spray Bottle (they're fine everywhere else). Less is more — extra oil clogs valves. Every formula performs exactly the same without oils.
Last reviewed: April 2026
The three essential oils in the range:
Fresh, bright, clean. Pairs well across the full range, including foamers.
Zesty, uplifting. Great in dish, laundry, and the loo. Avoid foamers.
A blended oil. Soft, soothing, floral. Popular for laundry.
Can I add essential oils for scent?
✓ Yes, with one foamer exception
Essential oils can be added to most products for a subtle scent. The one exception: no citrus oils in the Foaming Spray Bottle, where they accelerate wear on the foaming mechanism. Every formula works perfectly without oils — scent is purely optional.
How many drops should I add to each product?
Dose depends on the product. 5 drops into the fabric softener dispenser for laundry or in the Spray Mop tank, 3 drops max in the Atomiser or Foaming Spray Bottle, 2 to 3 drops in Dishwashing Liquid, 1 to 2 drops on a Dishwashing Tablet, and a few drops into the toilet bowl with a Loo Cleaner Tablet. Less is more — too much oil clogs valves and damages tools.
Laundry products
✓ Sensitive Laundry Liquid and Sheets
Add 5 drops of essential oil to the fabric softener dispenser on your machine. Leave the softener setting on so the dispenser triggers later in the cycle, which keeps scent from rinsing away early. Lavender Calm and Eucalyptus Oil are popular choices.
✓ Softener dispenser only, no softener product
The fabric softener dispenser on your machine is the spot for oils. Sensitive Laundry Liquid keeps fibres soft on its own, so you don't need an actual softener product — just the oils in the dispenser slot. Sensitive Laundry Sheets work the same way: drop oils directly onto the sheet before placing in the drum.
Universal Cleaner and Spray Mop
✓ Atomiser Spray Bottle
Add 3 drops max per full 300mL Atomiser Spray Bottle. Swirl gently to disperse. Any more than 3 drops can build up and damage the fine spray valves.
✓ Spray Mop tank
5 drops per tank of Universal Cleaner in the Spray Mop. Swirl the tank gently before attaching to the mop. Less is more.
Foaming cleaners
✓ Bathroom and Shower Cleaner
Add 3 drops max per refill into the Foaming Spray Bottle, then swirl to mix. Use Eucalyptus Oil or Lavender Calm. Resinous or thick oils raise clog risk, so go light or skip them.
✓ Kitchen Grease and Oil Cleaner
Same 3 drops max per refill in the Foaming Spray Bottle. Swirl gently. This formula already cuts heavy grease, so oils are purely for scent, not cleaning power.
⚠ No citrus oils in foamers
Avoid Lemon Scented Tea Tree Oil and other citrus oils in the Foaming Spray Bottle — they accelerate wear on the foaming mechanism. This applies to both Bathroom and Shower Cleaner and Kitchen Grease and Oil Cleaner. Citrus oils are fine in Dishwashing Liquid, Dishwashing Tablets, and the Atomiser Spray Bottle.
Dish products
✓ Dishwashing Liquid
Add 2 to 3 drops directly into the Dish Pump or your squeeze bottle. Lemon Scented Tea Tree Oil works especially well, giving a fresh scent while you wash up. Swirl gently to mix.
✓ Dishwashing Tablets
Place 1 to 2 drops on top of the Dishwashing Tablet in the dispenser tray before closing and running the cycle. Heat releases the scent through the wash.
Loo Cleaner Tablets
✓ Loo Cleaner Tablets
Drop a few drops of essential oil directly into the toilet bowl after the Loo Cleaner Tablet has dissolved. Oils sit on the water's surface and release scent gradually.
✓ Popular oil pairings for the loo
Eucalyptus Oil and Lemon Scented Tea Tree Oil are the most popular choices for the loo. Citrus oils are fine in the bowl — the foaming restriction only applies to the Foaming Spray Bottle.
What are the best practices for adding essential oils?
Start with fragrance-free product for a clean scent base.
Add oils fresh at each refill — aromas fade in storage.
Spot test on delicate fabrics or sealed stone if you're unsure.
Store oils in a cool, dark place and keep the cap clean to prevent contamination.
✓ Prefer zero scent?
Simply leave the oils out. Every formula performs exactly the same without them. Every Koh product is fragrance-free by design.
✓ Prefer zero scent?
Simply leave the oils out. Every formula performs exactly the same without them. Every Koh product is fragrance-free by design.
Fragrance-free by design. Add 3 drops max to a refilled Atomiser for a subtle scent boost.
300mL refillable spray bottle. Mix with diluted Universal Cleaner and 3 drops of essential oil for an everyday surface spray.
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