Is his light on a timer? If not, visitors or visiting others sometimes mean new schedules around them. People going into the room, more talking and laughing going on around them, perhaps someone flicking on the light, or turning off the light earlier than the hedgie is used to. Mine wake up just after I turn off the light, regardless of what time I do that. About 30 min after lights out, here they come. So I have to be consistent myself (or buy a timer if my life changes) to help them stay on schedule.