Living with Sleepwalking

My 26 year old son Pete sleep walks. Almost every night he gets up about 30 minutes after he goes to bed and comes out into the living room and usually on to the kitchen he goes. He will sometimes poor something to drink in a glass and drink it , or make a sandwich and he just stands in the kitchen and eats it. Sometimes he will come over and sit down with me in the living room for a while. Sometimes he will go outside and smoke a cigarette. He sometimes will do things like move things from the refrigerator and put the items on the pantry shelf or just move things around in the kitchen .

Ive had him take dishes from the drainer and put them away even. He will sometimes put odd things in glasses and try to drink it even. Last night he opened a bottle of ketchup and squirt it into a glass until the glass was a third full of ketchup. He then took the glass outside and put it on the porch and then came back inside. He found the glass of ketchup this morning and asked me about it and I told him he did that last night. It upset him, he says, “why do I do that , I wish I could stop! “.

Sometimes he will change the channel on the tv. Does anyone have any ideas of what to do, if so please tell me.
thanks, Ferol J.