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How do I use Dishwashing Tabs for best results?Updated 3 days ago

TL;DR: One whole Dishwashing Tab per wash. Drop it straight into the detergent dispenser for normal, auto and eco cycles. The PVA film is water-soluble, so it stays on. For quick or 30 minute programs, lay the tab flat on the tub floor under the lower spray arm instead, because the dispenser may not open in time. Keep tabs whole and handle them with dry hands. Works the same way in full-size, compact and drawer dishwashers.

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Koh Dishwashing Tab going into a dishwasher detergent dispenser
Clean glassware unloaded after a wash with Koh Dishwashing Tabs

Should I cut the tabs or take the film off?

No to both. Each Koh Dishwashing Tab is pre-measured for one full wash and balanced for the cycle, so a half tab is a half dose for a full load and won't clean it properly. Leave the PVA film on as well. It is water-soluble and designed to open at the right moment in the cycle, and it keeps concentrated detergent off your hands until then. Handle tabs with dry hands, because wet fingers start the film dissolving before the tab reaches the dispenser. One whole tab, film on, every wash.

✓ One whole tab, film on, every wash

Each Dishwashing Tab is pre-measured for one full wash and balanced for the cycle, so half a tab is half a dose for a full load. Keep them whole.

The PVA film stays on too. It's water-soluble and designed to open at the right point in the cycle, and until then it keeps concentrated detergent off your hands. Dry hands only, because wet fingers start the film dissolving before the tab gets to the dispenser.

One tab per wash Film stays on Dry hands

Where should I put the tab?

Placement depends on the cycle. For normal, auto and eco cycles, drop the tab straight into the detergent dispenser and close the flap. The dispenser opens mid-wash and releases detergent at the right moment. For quick or 30 minute programs, the cycle can finish before the dispenser opens or before the tab has fully dissolved, so skip the dispenser and lay the tab flat on the tub floor, centred under the lower spray arm. In drawer and compact dishwashers the same rule applies: dispenser for standard cycles, tub floor for quick ones.

✓ Normal or auto

Straight into the detergent dispenser. Close the flap. That's it.

Dispenser

✓ Quick or 30 minute

Tub floor, flat, centred under the lower spray arm. The dispenser may not open in time.

Tub floor

✓ Eco or low temp

Start with the dispenser. If residue turns up, move to the tub floor next wash.

Dispenser first

How should I load the dishwasher?

Loading matters more than most people realise. Spray arms need a clear path to every dish, so no nesting bowls inside bowls, no plates packed too tight for water to move between them, and nothing tall blocking the top arm. Scrape off large food scraps but don't pre-rinse, because modern dishwashers and the enzymes in Koh Dishwashing Tabs need something to grip onto. Place bowls and cups facing down on the top rack, stand plates between the tines on the bottom rack, and face dirty surfaces towards the centre where the spray hits hardest.

✓ Loading checklist

1

Scrape, don't rinse. Modern dishwashers need some food residue for the enzymes to grip onto. A quick scrape is plenty.

2

No nesting. Bowls, cups and spoons need space, or they'll shield each other from the spray.

3

Dirty side down and in. Face soiled surfaces towards the spray arm, not the walls.

4

Dry hands only. Wet fingers start the PVA film dissolving before the tab hits the dispenser.


What if dishes are still cloudy or spotty?

Cloudy or spotted glassware is usually hard water rather than the tab. Try four things in order. Top up the rinse-aid reservoir, since rinse aid helps water sheet off glass cleanly in hard-water areas. Run a hotter cycle, because eco cycles can struggle in very hard water. Move the tab to the tub floor if you are on a quick or eco cycle, since dispenser timing may be the problem. And refill the salt reservoir if your dishwasher has one. Dull and chalky all over points to hard water needing ongoing rinse aid plus salt. A few spots here and there is usually a loading issue.

✓ Try in order

1

Top up rinse aid. Helps water sheet off glass cleanly in hard-water areas. Dishwashing Tabs do most of the work, rinse aid finishes it.

2

Run a hotter cycle. Eco cycles can struggle in very hard water. Step up to normal or intensive.

3

Move the tab to the tub floor. If you're on quick or eco, dispenser timing may be the issue.

4

Refill the salt reservoir. If your dishwasher has one, dishwasher salt helps the softening system handle hard water. Dull and chalky all over usually means salt plus ongoing rinse aid. A few spots is usually a loading issue.


How should I store them?

Keep the box sealed when the tabs are not in use. Store them somewhere cool and dry, out of direct sunlight and away from the sink or the dishwasher, because steam and splashes start the PVA film dissolving. Handle with dry hands only. Check the use-by date printed on the pack rather than assuming a stored tab is good indefinitely. Around 2 months in an average home at one tab per wash.

✓ Storage rules

Keep the box sealed between washes. Store somewhere cool and dry, out of direct sunlight and away from the sink or the dishwasher, since steam and splashes start the PVA film dissolving. Dry hands only.

Check the use-by date printed on the pack. Around 2 months in an average home at one tab per wash.

Sealed box Cool and dry Dry hands Around 2 months

Koh Dishwashing Tabs

Dishwashing Tabs

Around 2 months in an average home. 10 ingredients, two enzymes, each tab sealed in water-soluble PVA film. GECA certified, Sensitive Choice approved.

No loose powder to handle
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Dish Starter Kit brings the dishwashing line-up together in one box. A tidy way to start if you have not tried Koh before.

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Last reviewed: September 2026 · Koh Australia

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