I always find it hard to sleep in a new place.  Last night I was trying to sleep at an airport hotel.  The bed was comfortable but the room made strange noises.  I could hear the sound of water running through pipes.  I could hear the electrical hum.  I could hear the fans used for cooling.   All of these are sounds I can cope with but the mystery creaking disturbed my sleep.  It’s not regular or rhythmic and I still can’t work out what is causing it.  I can’t even tell what direction it’s coming from (though that does suggest that I’ve been sharing a room with multiple creaky things.)

I turned off the air conditioning at around 3am, in case it was the culprit, but now the room is just hot and creaky.