This confirms my suspicions about what seems to be the most practical method. I was told by my mum, who arguably hasn't used cloth for nearly 30 years!

that I needed to soak them with milton, although I realuise that this is not for modern nappies and mainly was used for the old terry squares.
I am getting a lovely bottle of French lavender oil from the farm down the road from my mum, the benefits of having a parent that lives abroad! so will use that to scent the bucket.
Cheers for the advice ladies xx