how/when do I move this on? She uses the potty several times a day, but on her own terms - i.e. only when she is naked. If she has a nappy or pants on she'll do it there, if shes got nothing on her bottom half she's about 95% reliable.
What can I do now to move us on to the next step? her sister sort of cracked it instantly - once she knew what we wanted it was all done in a week.