DS1 is 27 mths and we started potty training 2 weeks ago. After the first few day (which I found a nightmare) he suddenly got it and has been dry in the day for over a week now. He goes without nappy for his nap and stays dry. To my surprise his night nappy has been dry 5 days out of the last 7, and even the couple of days it was only very slightly wet. Had absolutely no idea this could happen, and quite happy to leave in nappy at night, but just wondering if I should take nappy off in case he goes back to wetting? Or how long should I leave him in nappies if he keeps being dry?