It's is becoming a total nightmare.
In the interests of full disclosure, he has aspergers (and PDA).
We have chats with him every few days - your sleep cycle is mucked up, you need to stay in bed if you wake, just don't get up, etc etc etc. He uses a sleep app, we take his phone off him.
But almost every night, he gets up and goes for a snack. We have no clue how long he is up, but the evidence that he has been up is always there - lights on which weren't when we went to bed, kitchen cupboard open, less milk in the fridge etc. Today I got up to find Celebration wrappers AND a crisp bag in the bin. It is wearing me out, so I have no clue how he must feel.
He is very well fed during the day, he has never slept well, but this is wrecking any chance he has of rectifying his sleep cycle.
He will not listen to anything we ask him to do. Any tips at all?