How to stop kids from urinating (bye bye and thank you diaper) while sleeping at night?

Its hard for them to control especially when they sleep so good. My son was potty train since 3 and now he is 5 but probably 1-3x a month he pees on the bed. I would advise you to have them pee as often as possible before they sleep. Even they are in bed and still awake, tell them to try to pee. I also sometimes notice my son moves a lot at midnight, i wake him up and tell him to pee. It helps.