Demijohn unable to clean.

• Soap and water
• White vinegar with or without water
• Oxy cleaning products
• Bottle brush
• scour on a wire
• Dencha tablets (my dad use to use)

Tanglefoot said:

I can remember my mum cleaning out glass bottles with loose shot from a shotgun cartridge, swirled round in some sort of light scouring solution.

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Agentgonzo said:

How long did you use the oxy products for? Stubborn stains benefit from a 24h soak.

Other than that, try something more aggressive. PBW is good (again, 24h soak) or consider caustic cleaners like truckwash etc.

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Adrian Lock said:

Good afternoon, i have a number of Demijohn that belong to my late father.
Which he used for wine making I am going to be using those at my wedding however I have one that I cannot remove the stains from it looks like a water stain see picture but no matter what I try it does not seem to shift. Id still like to keep them in condition they can be used again for their intended purpose if possible. Ive tried all thw ideas auggested. Such as

• Soap and water
• White vinegar with or without water
• Oxy cleaning products
• Bottle brush
• scour on a wire
• Dencha tablets (my dad use to use)

It just won't budge. Reluctant to use bleach and don't have any sterilising solution(my brother thinks that wont work)

Doea anyone have any ideas please

View attachment 103087

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peterpiper said:

I was given a couple, with similar stains on the walls, looking like dry cement. These came off fairly quickly, using a pressure washer (it was type that had a pulsating jet action).
That might be less effective, where staining extend up the shoulders.

When using steradent type denture tablets, using just one or two, in a DJ full of water would be too dilute. Try two, plus about a mug of hot water. Once one section becomes clean, reposition DJ to treat next area.

I sometimes use a demijohn brush, which is shaped to match DJ profile. It would be a struggle to reach all the demijohn with a "bottle brush".

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An Ankoù said:

Why are you reluctant to use bleach? It would be my first choice.
It may be something to do with the glass; I have an Erlenmeyer flask which shows the same white and immovable streaks when it was clear before As long as it;s sanitised properly it'll be just fine.
And before anyone pipes up; in the very unlikely event that it;s some kind of biofilm shielding a horror of some description, bleach will remove it, but it looks like etching to me.

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foxy said:

Why not just use sodium perborate? It is the active ingredient for denture cleaners and a hell of a lot cheaper.

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