Yeast washing when saving yeast cake / slurry

Answering a question from The Geeky Dad about yeast washing and if I think it is necessary when saving yeast cake / slurry from a batch.

Thanks for the question.

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Sarah is an experienced home brewer, a qualified BJCP beer judge, organiser of the Welsh National Homebrew Competition and sometimes Brewtuber under her home brewery name, Daft Cat Brewing

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