I had my snake disappear on me for roughly two weeks. It was my own fault, I was spacey and forgot to secure the cage properly after feeding him. I laid all of these traps, and hides with heat sources, and in the end I woke up two weeks later to a dog hogging the bottom half of the bed, a dog hogging the pillow and a snake curled under my chin. I'm partially grateful I don't scare easily, and don't roll in my sleep.
Although I do admit that I kept my door shut tight so I was fairly secure with the knowledge that the snake hadn't left the room. However, I did not pull the entire room apart like a madman, because the snake is still pretty small and I didn't want to unconsciously squash him, I only looked in the obvious nooks and crannies. My room looks like a tornado lives there.
A few things I found that people have used:
- Flour trail (already mentioned) but people have also used pennies (I have no idea who has that many pennies laying around, but hey), sand, sticks, crinkled newspaper.
- Create a small box hide with a small low watt heater on the ground in a corner of the room (try to lure with prey here as well overnight, he could pull a snag and run, but at least you know he's there and eating)(already mentioned)
Or place a live prey in a critter keeper on the floor, (the snake wouldn't be able to eat it, but it would get the snakes attention.)
- Keep your ears open in the evenings (8pm-10pm-ish) in case you hear something
- Keep an eye on pets in case they pick up on the snake (dogs, cats, heck, even pet birds will alert call)
- Keep doors shut as you search, (already mentioned) as you compartmentalize, make it harder for the snake to move to an already checked area
- Check under heaters, fridges, ovens, even washing machines/dryers/on top of hot water pipes if you think the snake had access (already mentioned) I'd even check couch or seat cushions in the furniture.
- Although its very unlikely, it has happened that Bp's have been found lodged between the wall and a bookcase or dresser
- The snake could very well find you before you find it. :P