Dirty bottles!

[blockley]

I bought a load of crates with bottles from Facebook Marketplace.
The bottles hadn’t been rinsed before they were put back in the crate and it looks like they’ve sat around for 12 months or more.
The slightly scary black gunge at the bottom of the bottles does not want to shift.
I’ve soaked the bottles, used a bottle brush (albeit quite a soft one) and even had a test run through the dishwasher but some of the bottles (not all) refuse to let the gunge go!

Does anyone have any tips or suggestions that may help?
Thanks in advance.

 

[nixhaz]

https://www.the-home-brew-shop.co.uk/acatalog/The-Blast-Bottle-Washer.htmlI've used this before with good results for filthy bottles.

 

[MikeB.]

Drop some uncooked rice in there with a little soap and water, then shake like a madman, should clear it by acting like a scourer

 

[Clint]

Bleach! Get a big tub,hot water,cheap bleach...leave for a few days.
I had a load full of slug cack and spiders nests...they're full of beer now.

 

[Galena]

I would suggest soaking with VWP and hot water for a good while, it is designed for cleaning in place where you cannot reach like brewery plant and pies etc. I use it and you can see it lifting the muck off, then use a bottle brush on it and do it again if necessary

 

[Leon103]

Try sodium procarbonate. If that doesn't work then throw them.

 

[Clint]

I can always reach pies...

 

[BlackRegent]

...they're full of beer now.

Is that with or without the slug cack and spiders' nests?

 

[Clint]

Hopefully.. without!

 

[MZonard]

I've used a pressure washer on filthy bottles. Stand them in a crate and give each bottle a good blast.

 

[steve123]

I use Chemclean, soak in hot water over night. Used it on mouldy and stained bottles with good results.

 

[Random Badger]

"scary black gunge"

 

[AXW123]

soaking in oxyclean shifts most stuff.

 

[tld6008]

Bleach 1 cup/gallon