A dishwasher cleaning tablet removes built-up grease, limescale, and odors in one cycle when placed in the correct spot and run on a normal wash.
A fresh-smelling dishwasher starts with a cleaning tablet — but exactly where you put it depends on your brand and whether dishes are inside. The wrong placement leaves residue behind, and skipping the final air-dry step lets odors return. Here is how to use a dishwasher cleaning tablet correctly, whatever product you have, with the exact steps that match official manufacturer instructions.
Where To Place A Dishwasher Cleaning Tablet
Placement depends on whether you are running the tablet with dishes or cleaning an empty dishwasher — and each brand has its own rule. Affresh dishwasher cleaner works both ways: when running with dishes, drop one tablet in the bottom of the tub and add your regular detergent to the dispenser; when cleaning an empty dishwasher, put the tablet in the detergent dispenser. For heavy buildup, Affresh says you can use one tablet in the dispenser and one on the bottom, running the cycle without dishes. Never put a cleaning tablet in the rinse aid compartment — it is not designed for it and will not dissolve properly.
Step-By-Step: How To Run A Cleaning Cycle
- Check your product label first — instructions vary. Some tablets must be used in an empty dishwasher only; others work with dishes inside.
- Remove the tablet from its wrapper unless it comes free. Non-dissolvable packaging will not break down in the cycle.
- Place the tablet in the detergent dispenser (for an empty cycle on most brands) or the bottom of the tub (if the product says to use it with dishes).
- Do not add extra detergent or other cleaners unless the tablet instructions specifically allow it. Affresh allows regular detergent when running with dishes, but many cleaners are designed for a detergent-free cycle.
- Run a Normal wash cycle. Some products recommend the hottest, longest, or Heavy/Sanitize cycle for heavy buildup — follow your product’s guidance.
- Keep the door slightly ajar after the cycle finishes. This lets moisture escape and helps prevent odors from returning. Affresh’s official instructions emphasize this step.
Common Mistakes To Avoid
- Using one tablet with dishes when the product says empty-only. The tablet may leave residue on plates and glassware.
- Adding detergent along with the tablet when the product says to skip it. Over-sudsing can happen.
- Placing the tablet in the wrong compartment. Rinse aid dispensers are not made for cleaner tablets.
- Skipping the door-ajar step. Trapped moisture is the fastest way to bring odors back after cleaning.
- Using more than one tablet when the label says one at a time. Affresh is an exception — it allows two for neglected machines, but most brands do not.
If you are looking for the right product to start with, our tested roundup of the best dishwasher cleaning tablets compares top-performing brands based on actual results.
When To Use A Cleaning Tablet
Most manufacturers recommend cleaning the dishwasher once a month or whenever you notice odors, visible buildup, or cloudy glassware. A neglected machine may benefit from two tablets on the first use, depending on the product instructions. These tablets are designed for dishwashers only — do not use them in laundry machines or other appliances. The cycle itself is straightforward: one tablet, one normal wash, and the door left ajar to dry out.
FAQs
Can I use a dishwasher cleaning tablet with dishes inside?
Yes, if the product instructions say it is safe. Affresh is one brand that allows dishes when the tablet is placed at the bottom of the tub. Most other brands require an empty dishwasher, so always check the product label first.
How often should I clean my dishwasher with a tablet?
Monthly cleaning is the standard recommendation from most manufacturers. If smells or residue come back sooner, clean more frequently. A neglected machine may need two cleaning cycles on the first go.
Do I need to remove dishes before using a cleaning tablet?
It depends on the brand. Some tablets are made for empty dishwashers only and will leave residue on dishes. Others, like Affresh, work with dishes if you place the tablet in the tub bottom. Read the label on your specific product before starting.
References & Sources
- Affresh. “How To Use Dishwasher Cleaner on Smelly Dishwasher.” Official instructions covering placement, cycles, and the door-ajar step.
- Whirlpool. “Affresh Dishwasher Cleaner Instructions.” Brand-specific guidance on using tablets with dishes and for heavy buildup.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.