DS1 is almost 3.5 and has been dry in the day for over a year. He doesn't regularly nap any more but if he does he stays dry. I'd really like to get him dry at night as he's very big/tall (1m6cm and 18kg) and it's hard to find nappies to fit properly. But I've no idea where to begin night training him. His nappy is usually wet in the mornings. Do I really have to wait till it's dry or can we start training him anyway? For daytime training we just started when he was 2 as we live in Belgium and kids have to be dry to start kindergarten at 2.5. Is there any point doing something similar for nights? Is it really hormone related?