She may just be waiting too long because she's busy playing or just doesn't want to go until she's started. If she has no frequency,temperature elevation,signs of yeast infection (been on antibiotics or anything)I'd venture a guess that the "newness and Big girl" effect have worn somewhat and she'd rather not be bothered. Be patient,don't scold,just remind her how nice it is to have dry panties so she doesn't get sore or dirty the furniture. She just needs to be reminded that girls outgrow diapers. Then they smell better,feel better,and it really doesn't take that long to "Potty".