Dishwasher not cleaning dishes well?
You walk into the kitchen, pop the machine open, and realise your tea mugs still have ugly brown rings and the dinner plates feel completely greasy. If you find yourself asking, why is my dishwasher not cleaning dishes well?, you are certainly not alone.
It is a massive source of household tension when your trusty appliance lets you down. Don't worry, we've all tried the weird hacks, like throwing random cups of product into the tub or scrubbing the racks with old toothbrushes.
But before you call out an expensive repairman, there is usually a much smarter way to fix it ourselves, here is our checklist of common occurring problems with automatic dishwashers not performing to their best.
Dishwasher Troubleshooting Overview Table
Issue | What to Check | Actionable Fix | Maintenance Frequency / Tip |
|---|---|---|---|
Spray Arms | Check for blockages in their rotation path and look for hard water minerals or food debris clogging the spray holes. | Manually spin the arms to ensure fluid rotation, and clear out blocked holes using a toothpick. | Check regularly (every 3 -6 months) to keep water circulating freely. |
Filter & Drain | Look for dirty, stagnant water pooling in the bottom of the dishwasher | Lift out the cylindrical filter assembly, rinse it under hot running water, and scoop out any food debris. | Clean the filter every 3–6 months for optimal, peak performance. |
Dish Loading | Check if dishes are overcrowded or if cups are stacked directly on top of each other. | Space items out properly to ensure the water spray can reach every surface. | Learn proper loading techniques to achieve total water circulation |
Cutlery Placement | Look for "nested" cutlery, especially spoons that naturally hug each other and trap food. | Spread forks, knives, and spoons evenly throughout the basket instead of grouping them. | Mix up your cutlery placements every time you load. |
Detergent Dispenser | Check if the dispenser door is completely dry and closes firmly. | Ensure a proper seal so the dishwasher tablet releases correctly and dissolves fully. | Keep the dispenser clean of blockages |
Detergent Quality | Check if you are using traditional hard-pressed products or dishwasher tablets that may struggle to dissolve fully during quick washes. | Switch to a fast-dissolving, multi-action dishwasher tablet such as Fairy 30 Minute Miracle. Make sure your hands are dry before taking a dishwasher tablet out of the bag. This will prevent the tablet from starting to dissolve and keep the tablets from sticking together in the bag. | Fairy 30 Minute Miracle activates immediately to shift tough stains. |
How to fix a dishwasher not getting dishes clean: The ultimate checklist
To get your appliance back to peak performance, work your way through these simple, actionable maintenance checks:
1. Check the spray arms for obstructions and clogs:
Manually spin the spray arms to ensure a fluid rotation, ensure nothing is blocking them in their path. Occasionally, the tiny spray holes can clog from hard water minerals or hidden food debris, causing a dishwasher to not clean dishes properly. Clear them out using a toothpick to clear the blocks.
2. Inspect the filter and drain:
You should never see dirty, stagnant water pooling in the bottom of the dishwasher. If you are seeing this it could mean you have food debris that has formed obstructing the water from draining, lift out the cylindrical filter assembly and rinse it under hot running water to remove slime, scoop out any food that has also built up.
3. Master the art of loading:
Proper positioning makes a huge difference. If you crowd your plates or stack your cups directly on top of each other, the water spray can't reach them. Learn how to load the dishwasher to ensure total water circulation.
4. Mix up your cutlery:
Spread your forks, knives, and spoons evenly throughout the basket. If you place all the spoons in one slot, they will naturally hug each other, trapping food particles between them.
5. Check the detergent dispenser:
Make sure the little dispenser door closes firmly and is dry. This ensures the dishwasher tablet can be released properly and can fully dissolve giving you the best clean.
Make sure your hands are also dry when taking a tablet out of the bag. This will prevent the tablet from starting to dissolve before the cycle begins and keep the tablets from sticking together in the bag.
Hopefully now you will have a fully working dishwasher, explore our other articles on how to maximise your dishwasher washes to solve any dishwasher challenges!
Frequently Asked Questions
The most common causes include a clogged filter, blocked spray arm nozzles, or incorrect loading that prevents water from circulating. Upgrading your detergent to a premium all-in-one capsule like Fairy 30 Minute Miracle can also instantly resolve performance issues.
For optimal performance, regular health checks are recommended but cleaning your dishwashers filter every 3-6 months can help your dishwasher run at peak performance.
Absolutely. Some traditional hard-pressed products as well as capsules that are not designed to dissolve quickly, can struggle to dissolve fully, especially during quick washes. Switching to a fast-dissolving multi-action tablet like Fairy 30 Minute Miracle ensures that the cleaning agents activate immediately to shift tough stains.