How do I do this? DS is 3 1/2 and has been potty trained and in underwear since last October. Night time is a whole different story. Our problem is dinner is at 6pm and he goes to bedtime at 8pm. He wants a bit of milk with dinner and we give him 1/2 a cup. Other than that, no liquids. He pees in his pull up ever night and we very rarely get dry pull ups. How do I move him into getting potty trained at night. Am I late in the process?