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Do I need rinse aid with Dishwashing Tablets?Updated 4 days ago

TL;DR: No, but it can help in some situations. Dishwashing Tabs are designed to clean effectively without rinse aid. Add rinse aid if you're seeing water spots on glassware, cloudy residue, or dishes (especially plastics) coming out wet. Hard-water areas benefit most.


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Koh Dishwashing Tabs effective
Koh Dishwashing Tabs before and after

Do I need rinse aid?

No. Koh Dishwashing Tabs are designed to clean effectively without rinse aid. Some dishwashers and water types benefit from it though. Add rinse aid if dishes are coming out with water marks, cloudy glassware, or not drying well, particularly with plastic-heavy loads. Hard-water areas benefit most because mineral-rich water leaves more deposits without rinse aid to help water sheet off cleanly.

✓ Not required, but can help

Dishwashing Tabs are designed to work without rinse aid. Some dishwashers and water types benefit from it though. Adding rinse aid can lift results if dishes show water marks, cloudy glassware, or aren't drying well.

Optional Lifts drying

⚠ When rinse aid helps most

Hard-water areas where mineral-rich water leaves deposits. Dishwashers that struggle with drying. Loads with lots of plastic items, which hold water droplets more than glass or ceramic.

Hard water Drying issues Water spots Plastic items

How do I add rinse aid?

Most dishwashers have a rinse-aid reservoir next to the detergent compartment, often marked with a snowflake or star icon. Open the cap, fill to the max line, and close. Rinse aid releases automatically during the rinse cycle. A full reservoir typically lasts 1 to 3 months depending on use. Most dishwashers have an indicator light or window showing when it's running low. Use any standard supermarket rinse aid, no special formula needed.

✓ Three-step add

1

Find the reservoir. Next to the detergent compartment, usually marked with a snowflake or star icon. Pop the cap.

2

Fill to the max line. Any standard supermarket rinse aid works, no special formula needed.

3

Close the cap. That's it. Rinse aid releases automatically during the rinse cycle. A full reservoir lasts 1 to 3 months. Watch for the low-level indicator on most dishwashers.

Koh Dishwashing Tabs 50pk

Dishwashing Tabs · 50pk

10 ingredients, fragrance-free. Septic and grey water safe. PVA film stays on, no unwrapping needed.

Koh Dishwashing Tabs in use

New at Koh?

A 50pk lasts about 2 months for a standard household. Drop one in the dispenser, run your usual cycle, no unwrapping needed.

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Last reviewed: July 2026 · Koh UK

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