My 4 year old has been completely toilet trained during the day since 2 1/2 years, I was told wait till his night time nappies are dry before night training, this never seems to happen and aged 4 he still wears nappies at night! He says he doesn't want to wear them at night any more and I stop him drinking several hours before bed and he still wakes up with quite wet nappies, any advice on night training? I would love him out of them asap