My 12 yr old ds was definitely on the later side for nighttime training, but using one of those alarms really worked when he was around 7-8. After about 2-3 years of not having nighttime accidents, it started to happen occasionally (like a couple of times a month). Since this past spring it’s picked up and happens about once a week. We monitor what he eats/drinks in the evening and try to stop all food/water by 8:00, although sometimes he will end up drinking some more water before bed. We have his annual ped visit coming up soon so we will be discussing with his dr. But just so frustrated that it continues.