A person kneeling in front of an open dishwasher, preparing to clean the interior spray arms
The Hidden Cause of Dirty Dishes
Millions of households run their dishwashers daily without a second thought, only to pull out plates covered in baked-on grime. While many blame the detergent, the real culprit is usually hiding in plain sight.
A simple maintenance routine can drastically extend the lifespan of your machine and restore its cleaning power. The best part? You only need a standard wooden toothpick.
A person inspecting and cleaning the internal components of an open dishwasher.
Why Spray Arms Fail
The problem originates in the tiny nozzle openings located on the rotating spray arms inside the appliance. Over time, these small jets become completely blocked by limescale, grease, and microscopic food remnants.
When the nozzles clog, the water pressure drops significantly, leading to uneven and ineffective cleaning. Worse, the internal pump is forced to work against this increased resistance, causing the motor to wear out prematurely.
The Toothpick Extraction Method
To fix this, you must remove both spray arms from the machine. The lower arm usually pops off with a gentle pull or a slight twist.
The upper arm requires pulling the top rack completely out before detaching it. Once removed, rinse both components thoroughly under lukewarm water.
Take your toothpick—a cocktail skewer or an unbent paperclip also works—and carefully poke through every single nozzle opening. Always push the debris outward, never deeper into the arm, to avoid creating a permanent internal blockage.
Deep Cleaning Stubborn Buildup
If hard water deposits and grease refuse to budge, an acidic soaking bath is highly effective. Submerge the spray arms in warm water mixed with citric acid or white household vinegar for about 30 minutes.
Afterward, rinse them under clear water, snap them back into place, and run the dishwasher empty on its hottest cycle. This flushes any remaining loosened particles completely out of the system.
Don’t Ignore the Bottom Filter
If your spray arms clog again shortly after cleaning, check the primary sieve filter at the bottom of the tub. A heavily soiled filter allows solid particles to bypass the trap and shoot directly back into the spray arms.
Experts note that constantly running the machine on “Eco-mode” at low temperatures encourages these unhygienic deposits. You should remove this bottom filter monthly, scrub it under running water, and replace it immediately if you spot any tears.
How Often Should You Clean Them?
Maintenance frequency depends largely on how often you cook and your local water hardness. Most industry experts recommend inspecting the spray arms every two to three months.
Appliance manufacturer Beko explicitly lists spray arm cleaning as a mandatory part of regular dishwasher upkeep. If you live in an area with particularly hard water, you will need to perform this check more frequently.
When reinstalling the top arm, pay close attention to the central connecting pipe attached to the upper basket. Limescale often builds up here, quietly restricting water flow before it even reaches the spinning jets.
If debris remains trapped deep inside the plastic housing, hold the arm with the intake hole facing downward and shake it vigorously until the blockages fall out.
