My son is nearly 3. He has been potty trained during the day since Feb. Just wondering about night time. My eldest son was almost immediately dry at night so I just stopped putting him in nappies. My youngest however is still waking up soaking wet. My question is do I just leave him in night nappies until he starts waking up dry? Or do I start trying to train him? I find it difficult to know if he is unable to hold it or if he is weeing because he knows he has a nappy on.