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On Monday, 22 April 2019 10:08:28 UTC+1, Bertie Doe wrote:
so the 900g drum will last a lifetime

I'm in my fifties with no children.
Do they do a 450g drum?

Just looked on ebay and you're right, there is a smaller drum :-
https://tinyurl.com/y3gb3ep9

https://www.ebay.co.uk/sch/i.html?_o...+566G&_sacat=0

I see your point, 568g divided by 3 would give you nearly 200 cleanings but
cheap compared with the sachets at £1 a pop.