tie a pinky to a chair or a cabinet handle using string. hopefully it comes out to eat.
i lost my mbk for 6 months during most of the brutal winter here in new york. i found her in front of my driveway around april. they are pretty durable so dont give up hope. just be weary when moving furniture around to look for your snake, and keep the food coming. they have to come out to eat sooner or later
having said that, i had my mbk in a 10 gal fish tank also. after i got her back, i went with a sterilite tub, 4 top hinges