I've only recently started to be able to check on Thomas. When he was younger he would wake as soon as I opened his door so it just wasn't worth it. Even now I won't always check on him, if he sounds a bit restless then I usually just leave him alone as he doesn't like being woken up. If he's sleeping soundly then I will check on him before I go to bed but it's just because I like looking at him sleeping rather than to actually do anything LOL, as I had to manage without checking him for so long.