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Black, oily gunk in dishwasher

I have had this problem with 2 European made dishwashers, a Bosch and an Asko (my current machine, model 3122). After 2 years the black rubber door gasket starts to dissolve, leaving a black, oily residue particularly on plastics, even plastics in the machine, such as the cutlery basket.[The rubber on some OXO utensils seems to be the same and it to gets gummy if washed in the dishwasher. Repairmen have blamed the detergent, Electasol, the same one that Bosch and Asko packed with the machines when I bought them. On the other hand, these repairmen admitted that they had not seen this problem before. Customer service said the same. Using different detergents produced only one result, dishes that needed to be hand-washed in the sink after being taken out of the dishwasher. The rubber gaskets continue to deteriorate, including the new gasket put into my Asko about a year ago. Questions: What is causing this? How can I stop it? Is the gunk a health hazard?

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  • Anonymous Apr 21, 2009

    I have a Whirlpool Dishwasher. The Gasket started falling apart after the first year. If you touch the gasket, you get the black coating on you. I have used only Cascade in it. It is painted steel and not stainless steel.

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6 Suggested Answers

  • 1 Answer

SOURCE: Dishwasher leaves a fine black sludge

I work in a hospital and have seen this problem with our scope washers (a very sophisticated dishwasher with lots of safety features) and it turned out to be a faulty pump motor.  Some pumps have black ceramic magnet in them and if it cracks it will breakdown and mix in with wash water creating a black smudge on everything with bits. Just as you described.  Unfortunately, I have never taken a part a dishwasher motor so I don't know if it's the same type of motor. 

Posted on Oct 11, 2007

  • 1 Answer

SOURCE: Tablet not fully dissolving during

How do I remove the filter on a CONCEPT II dishwasher? It is full with stuff.

Posted on Mar 30, 2008

  • 677 Answers

SOURCE: new dishwasher leaving powder residue on dishes.

the problem is hard water and there is a new product out called the dishwasher filtration system. it actually filters the water going into your dishwasher and leaves your dishes spot free. after the first load i was amazed that the white film was gone and my dishes were sparkling. you can get it at www.dishwasherfilter.com.

Posted on May 21, 2008

BurntLime
  • 8 Answers

SOURCE: Not cleaning properly

You could be using the dishwasher at a higher temperature than the biological agents in the tablets can handle, and so become denatured and can't clean your dishes properly. I have had this problem a little while ago and found that using the "eco" setting (should heat the water to around 30c and has the added bonus of using less water) works well and makes sure that all of the dishes are clean.
It could also be a problem with the release system, where the door the holds the tablet can't release it on time and so the tablet does not dissove. Have a check to see if anything is stopping the door opening and see if there is anything you can do to make it release on time.
Hope this helps,
BurntLime

Posted on Jan 05, 2009

  • 677 Answers

SOURCE: dishwasher does not clean dishes and leaves spots on everything!!

The problem is hard water that is leaving the spots. There is a fantastic product out called the dishasher filtration system. It filters the water going into your dishwasher and works amazing. It is very affordable and very easy to install. You can get it at www.dishwasherfilter.com.

Posted on Mar 14, 2009

  • 423 Answers

SOURCE: I got a layer of white cloudy film on my dishes after normal wash

Doing a full vinegar cleaning of the diswhasher is a good start, and every 6 months or so if you have hard water.
But, I have proven that using ultra-cheap dishwasher powder will cause this problem too. Recommend after you do the cleaining with white vinegar through a quick cycle with no detergent, you use only a brand name powder (like Cascade or Electrosol) and see if problems persist.
If problems remain, the heating element has probably failed. Once it is replaced, you will see a dramatic improvement. Good Luck!

Posted on Mar 30, 2009

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