Do you have a laptop? Whether you do or not, I like this idea:
Very quietly of course, place the laptop on the other side of the room from the sleeping duo. Put the computer's volume as low as it can go and, if possible, mute system sounds. Go to leekspin.com. Over the course of half an hour or more, slowly turn the volume up until it is as loud as it goes. They'll be awake at some point. They'll imagine Leekspin all day long. They'll hear the music when they're alone in the bathroom.
I don't know how much that would work.
