When some dishes come out spotless and others sit dirty in the exact same load, clogged asko dishwasher spray arms are usually the reason. Mineral deposits and food particles work their way into the small nozzle holes over time, and once enough holes are blocked, water pressure and coverage both suffer.
Locating the spray arms
Most Asko dishwashers have at least two spray arms: a lower arm beneath the bottom rack and an upper arm mounted under the middle or upper rack, with some higher-tier models adding a third arm near the top for the upper rack specifically. Each arm typically lifts or unscrews off its mounting point without tools — check for a center screw or a simple push-and-twist retaining tab before pulling.
Checking for clogs
With the arm removed, hold it up to a light and look through each nozzle hole. Mineral scale shows up as a white or gray crust around the hole edges; food debris shows as a darker, sometimes fibrous blockage. Run water through the arm from a faucet or spray hose and watch for holes that produce a weak trickle instead of a firm jet — those are the ones needing attention.
Clearing the nozzles safely
A toothpick or a fine wire — a straightened paperclip works well — can clear most nozzle clogs without damaging the plastic. Work gently and avoid forcing anything that does not move freely, since an enlarged or deformed nozzle hole changes the spray pattern the arm was engineered for. For mineral scale specifically, a soak in a mixture of warm water and white vinegar for fifteen to twenty minutes before scrubbing will loosen deposits that a toothpick alone will not budge.
Checking the arm’s spin freely once reinstalled
After reinstalling, spin each arm by hand to confirm it rotates freely without catching on a rack, a tall item, or its own mounting collar. A spray arm that cannot spin freely during a cycle produces the same uneven-cleaning symptom as a clogged one, even with perfectly clear nozzles, so this quick check is worth doing every time you clean the arms.
How this connects to overall dishwasher maintenance
Clean asko dishwasher spray arms work best alongside regular filter maintenance — a dirty filter sends more debris toward the spray arms in the first place, so the two jobs reinforce each other. If arms clog repeatedly within just a few weeks of cleaning, your water may carry unusually high mineral content, which is worth addressing through regular descaling; see our other maintenance guides for that process. Persistent uneven cleaning despite clear arms and a clean filter is worth a diagnostic visit to rule out a failing wash pump.
When to replace rather than continue clearing asko dishwasher spray arms
Cleaning clears most clogs, but a spray arm that has cracked, developed a stripped mounting point, or lost enough material around the nozzles from repeated aggressive clearing attempts may be due for replacement rather than another cleaning cycle. Genuine replacement arms, sourced using your Art. No. against Asko’s documentation or a trusted parts supplier, are worth the modest cost compared with continuing to work around a damaged arm that will never spray evenly again regardless of how thoroughly you clean it. Inspect the mounting collar each time you clean the arms, checking for cracking or excess play that suggests the plastic has become brittle with age and heat cycling. Catching a failing arm mount before it breaks off entirely during a cycle avoids the more disruptive mid-wash failure and the water disruption that can follow.
Keeping a simple log of asko dishwasher spray arms maintenance
Jotting down the date each time you clean the spray arms, even briefly on a kitchen calendar or phone note, makes it much easier to notice if clogging is happening faster than it used to — a pattern that often signals rising water hardness or a filter that is not being cleaned as consistently as the spray arms are. That kind of pattern recognition is hard to catch from memory alone but obvious once you have even a rough log to compare against.
Keep the toothpick or wire tool used for clearing nozzles dedicated to this task alone, stored somewhere it will not get lost between cleanings, so the job never gets skipped simply because the right tool was not on hand when you noticed a clog.
