Post actualizado el día octubre 25, 2026 by DeiviSanzPlay
Your dishwasher doesn’t clean badly because of the detergent. It cleans badly because it’s dirty inside. And that, although it may seem like a contradiction, happens to nine out of ten machines that have been running for more than two years without any real maintenance.
I took mine apart this weekend, I spoke with a local appliance technician and I tried the dishwasher cleaning tricks that circulate on the internet. Some work, others are outright myths. Here’s what really works in 2026.
White vinegar: the star trick, but with caveats
Distilled white vinegar is 5-6% acetic acid, and that breaks down the limescale and dried grease that sticks to the inner walls. Place a glass or a cup of vinegar on the top rack, with the machine empty, and run the hottest cycle your dishwasher has. The steam spreads the acid into every corner.
Be careful with frequency. Vinegar also attacks the rubber seals and silicone parts. If you use it every month, you’ll end up with leaks. The sensible thing is to do this deep cleaning of the dishwasher every 3 or 4 months at most, and use specific products in between.
And a detail that almost nobody mentions: if your machine has a salt reservoir or water softener, don’t put vinegar in that compartment. Only on the top rack, in an open container.
Baking soda for odors that won’t go away even with bleach
Sodium bicarbonate neutralizes the fatty acids that generate that strange fishy smell in the dishwasher. It’s not magic: it’s basic chemistry. Sprinkle a cup over the bottom, close it and leave it overnight. In the morning, a short hot cycle.
This treatment to eliminate dishwasher odor has a limit: it doesn’t reach the corners where decomposing food accumulates. If the smell comes back after three days, the problem isn’t the baking soda, it’s the filter. And that’s what we’re talking about now.
The filter: the real culprit behind poor washing
Here’s the key that many guides skip. The dishwasher filter collects food scraps and grease, and if you don’t clean it, that gunk recirculates with the hot water and goes back onto your dishes. It doesn’t matter what program you use.
It’s at the bottom, and it’s almost always removable by turning it a quarter turn. Take it out, rinse it with hot water and scrub it with an old toothbrush. If it has a sticky layer, leave it soaking in hot water with a squirt of dish soap for an hour.
Real frequency: once a month if you use the machine daily. If you have a dog or small children, every two weeks. It’s not overkill, it’s preventing the motor from working overtime.
Spray arms: the holes that stop letting water through
The spray arms have holes smaller than a millimeter. With hard water, those holes get clogged with limescale and the water stops reaching the glasses on the top. Result: dishes that come out with residue even if the tablet is high-end.
Remove them (almost all of them come off with a simple twist), unclog the holes with a toothpick or a thin wire and leave them soaking in warm vinegar for an hour. Rinse and reattach them aligned, because if they’re crooked, the water won’t reach the bottom.
This dishwasher cleaning trick is the one where you notice the biggest difference the next day. Really.
The door and the seal: the area nobody looks at
Wipe the edge of the door and the perimeter seal with a damp cloth once a month. A black film of grease and mold builds up there that smells awful and that no tablet touches because the water doesn’t reach it.
If the seal is stiff or cracked, replace it. It costs between 15 and 30 euros and prevents water from escaping underneath. A dishwasher with a seal in bad condition uses more electricity and dries worse.
Monthly maintenance: what really prevents expensive breakdowns
Once a month, use a specific dishwasher cleaner (they’re available at any supermarket). Vinegar and baking soda cover 80% of cases, but hard mineral deposits need a product formulated for it.
Also check the inlet and drain hoses every six months. Feel the floor around it: if there’s moisture, you have an early leak. Fixing it then costs little; ignoring it can mean replacing the parquet floor.
And listen to the machine. A new hum, a cycle that lasts longer than normal or dishes that come out wet are warning signs. Addressing them in time prevents 200-euro repairs.
Mistakes that make dishwasher cleaning worse
- Pouring in pure bleach: it corrodes the seals and metal parts. Never.
- Using vinegar and bleach together: it generates toxic gases. Never.
- Loading the machine to the brim: the water doesn’t circulate and the dirt stays.
- Not rinsing dishes with large food scraps: the filter gets saturated in two cycles.
- Thinking the tablet cleans the machine: it cleans the dishes, not the interior.
With these seven points, your dishwasher will wash like new again and you’ll extend its useful life by several years. It’s not about expensive products, it’s about consistency.
