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Got a weird one to try to solve 😕
Customer has a Bosch SGI6625GB/13 and everything is coming out BLUE from the machine 😯
The grey baskets, dispenser, spray arms, salt cap are all stained blue by whatever is causing this ❓ The salt is fine, rinse aid also, the machine operates normally. Mains water supply appears clear, salt regeneration set on 5 (as per local water co. reports on hardness level).
The only association I can think of is the fact the customer regularly uses ‘Finish Dishwasher Cleaner’ in it every month or so. That is coloured blue, but thats the only thought I can come up with. The customer is an Industrial Chemist and has even taken the cutlery in to be laboratory tested. The result being negative to any sedimentary deposits on the cutlery, however the metal has turned blue through ‘electrolosis’???
My departing comment to him was to stop using the Finish Cleaner and see how it goes 😕 but I really can’t think that could be the cause?
Any ideas guys ???
Martin
I recal something about an electrolytic reaction between steel and silver IIRC, but that should only affect the cutlery where the two touch. Beyond that you got me with that one and I’d have to say it was something foreign to the appliance from the supply.
Ask the customer to contact Reckitt Benkiser if it’s Finish he uses and they will analyse and advise.
K.
Penguin45 wrote:Nothing copper going in is there Martin?
Don’t think so Chris. My customer is certain the problem is caused by the Finish Cleaner and needs to get a sample from the machine to get tested. I have ordered a new Salt Cap for his machine so he can cut the old one in half and send one half to Reckitts (Finish) for testing and retain the other half as ‘evidence’ ????
3 years ago he used another (older) Bosch dishwasher, in the exact same location, using the exact same salt/rinse aid and detergent without problems. The new machine was fine for the first 18 months/2 years after which time he started using this Finish Cleaner and from then on the darned insides of the machine started to turn BLUE. He did not associate that occurance at all until today when I suggested it could be the Finish causing the problem?
But, why should THAT be the problem? I don’t understand, and feel there is something WE are overlooking here?? BUT WHAT ???
It’s a bl**dy fascinating mystery that’s for sure!
Martin
You could wean him off the cleaner – IME they’re not that effective and damned expensive to boot. Shooting in neat lemon juice when the flap goes “Thunk!” cost a fraction and works just as well!
Chris
Re: Dishes/Cutlery coming out dyed ‘blue’ in D/w
hi Martin,
just athought but as your customer is already a chemist…..is he bring his work home?
By that could he be washing test tubes/jugs in which there were chemicals etc…this would alter the electrical action and might cause accelerated electrolisis to occur. The colourant in the finish being the plating that is transfered. He might know if you run that one past him.
kevin
Re: Dishes/Cutlery coming out dyed ‘blue’ in D/w
Nice thought Kevin, but unfortunately he doesn’t even wear a white coat at work, or work in a laboratory. He’s a company director (pharmaceuticals/biologicals/medical equipment etc) and sits at a computer all day long!
Martin
Re: Dishes/Cutlery coming out dyed ‘blue’ in D/w
Is there a pen dropped in there somewhere whilst loading dishwasher?
Re: Dishes/Cutlery coming out dyed ‘blue’ in D/w
Simon46 wrote:Is there a pen dropped in there somewhere whilst loading dishwasher?
Thanks for the suggestion Simon, but I think even my customer who have spotted that if it were. We are not talking ink spots here but major staining all over 🙁
Martin
Re: Dishes/Cutlery coming out dyed ‘blue’ in D/w
I have seen this quite a few times. In those cases, It has been Finish being used, however, I have been to lots of the same machine where finish is not being used without the fault, so I think the Finish is a bit of a red (or blue) herring!
The suggestion of copper is an interesting one though, perhaps it is a chemical reaction between the tablet and copper, Copper sulphate is blue isn’t it!
Re: Dishes/Cutlery coming out dyed ‘blue’ in D/w
washerdoctor wrote:The suggestion of copper is an interesting one though, perhaps it is a chemical reaction between the tablet and copper, Copper sulphate is blue isn’t it!
That’s given me an idea 💡 Copper Bottomed Saucepans 💡 I wonder if they are washing them in there ❓ . I’ll find out and get back to you on that 🙂
Martin
Re: Dishes/Cutlery coming out dyed ‘blue’ in D/w
Copper sulphate is blue yes, but any copper corrosion is green,
you’ll probably notice this on the back of fridges.
I think it could be the Finish but wouldn’t there have been a mass epedemic.
woz
Re: Dishes/Cutlery coming out dyed ‘blue’ in D/w
It is highly unlikely to be the detergent, rinse aid or salt used in fact so unlikely it would litterally be a one in a million shot or, as Woz correctly points out, it would be an epedemic and not just a one-off.
It will almost undoubtedly be an external source causing the problem, either what the customer is putting in the machine in terms of loading or detergent etc.. It is possible that there’s something in the water, but then you’d expect a local epedemic in that case as well and, I’m guessing, that there’s been no other reported cases of it by the neighbours etc., unless there’s something really odd like a private water supply.
That being the case, it has to be something that the customer is putting in the machine one way or another as it’s the only logical explanation.
K.
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