Clean around him if you can, wake him up if you can't. He'll go back to sleep when you're done.
It's likely that if you left it until the evening it wouldn't much matter because he'd just stay snoozing in his hide all day anyway. But then of course the one day you do that will be the one day he can't sleep and decides to explore his explore his existential angst through abstract art instead, and you'll come back to a multimedia Study In Brown.