Another trick is plastic grocery bags. Place them where you think the snake may wander and when you hear the crinkle, you know where it is. Good for corners and behind sofas, etc. If it had easy access to the kitchen or a warm dryer in the laundry room, it could crawl up in there, too. I have a friend who just found her corn snake after 3 weeks, lurking up under the dryer. Crazy critters.
"Mai kolohe i ka mo' o o lele ka pali" -
Do not bother lizards or you'll fall off a cliff.