If it's not worth investing in, i don't have an expresso machine, will do the citric acid wash.
Puly caff is worth having if you have an espresso machine but it’s exactly the same stuff that dishwasher tablets are made of so you could crush one of those up for a one-off.
@Chalfie started
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If it's not worth investing in, i don't have an expresso machine, will do the citric acid wash.