dunno what to suggest really
I think it just takes longer for some children, especially deep sleepers
does she pee a lot during the day? Sounds like a hell of a lot of pee for the night, especially if she isn't drinking anything after 6. Are you sure she isn't going to the bathroom and drinking from the tap or something?
I'd just stick with the nappies until things change I think
My 4 year old dd is the same, now her 2.5 brother is potty training and has been dry at night twice now and dd has never been dry at night. Poor thing, but I'm trying to make her feel ok about it. I think they are all different and I'm just accepting it.
I have heard that witholding drinks does not help in fact get as much drink in them so bladder can expand and gets used to holding fluids.
Sure was told to avoid blackcurrant squash too.
Anyway both DS were in night nappies at 4 ds 1 was 5.
Not a big deal.