Grey or black coloured marks are visible on the surface of plates or the bottom of cups and mugs.
The is not a fault in your dishwasher and no repair or service will resolve this issue
Please refer to the notes below on how to avoid this problem.
Usually the result of:
- Cutlery scraping against the glaze of the china
Cause & Prevention
If cutlery or other metal items are scrapped against the surface of the china which has attacked by a similar mechanism to glass clouding the glaze becomes damaged and the metal leaves slight residues in the cracks resulting in "metal marks".
This is very common where metal items have been used for stirring, for example, tea spoons in cups.
Aluminium utensils are particularly prone to this problem.
The damage is irreversible and cannot be treated.
Be careful when using any metal implements with china items.
Try not to scrape metal against the surface of the china.
Do not allow metal utensils, especially aluminium ones, to touch the china when loaded in the dishwasher.
How You Can Get Help With Dishwasher Problems
To offer support in helping people to determine the cause of dishwasher problems please use the dishwasher support forum.
It’s fast, free, easy and normally someone will pick up on the post that can assist you often with a few experts chipping in if needed. Just register if you don’t have an account, we don’t mail you, send you spam or any of that stuff.
Post up your question and give images if you possibly can and the guys in the forums will do the rest for you and try to identify the problem you have.
Cost you nothing, might save you some embarrassment or worse, a charge for a service visit that wasn’t needed.
Photographs Of Damage
If you can post photographs of the damage or problem you are having this can be really helpful in allowing the dishwasher technicians to see what the problem is.
The guys have the knowledge to assist with most problems but the more information you give them, the better they can help you.