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Wednesday, January 16, 2019

Design Flaw: Clogs in Dishwasher Spray Arms

The job of a dishwasher is to wash one's dishes. Extensive Any pre-rinsing should not be required. The dishwasher manuals even state this.

And it's mostly true--modern dishwashers do a great job of getting the dishes clean, even if there is layer of spaghetti sauce or whatever on them. The spray arms have these teeny little holes, to produce a high-pressure spray. Combine that low-volume but high-pressure spray with extended time and high humidity, and it works wonders.

Problem is those tiny holes. They are prone to clogging. I can't think of any good way to prevent that. So my complaint is not the clogging itself. My complain is how difficult it is to un-clog them.

Sure, you can ream them, as this video explains. But all too often, that just drops the clogging particle back into the body of the spray arm, where it will lurk, waiting to be pushed back into the orifice the next time a cycle is run. This typically lasts ~10 cycles, until the particle has been sufficiently eroded as to no longer block the orifice.

The MVP solution, IMO, is for the arm to be disassemble-able. I want to be able to open up the arm, to access the interior, so I can flush out the offending particle. Ironically, my very first, builder's-grade dishwasher had this feature. None of the 4 higher-end ones since then, including a very highly rated Bosch model, has.



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