Loose snakes are never easy to find. My African Housesnake got loose twice. He is only 18-24 inches full grown. Systematically tore my bedroom apart 3 times in 2 days and blocked off the bottom of the door to find him. First time I found pretzled up in the wired controllers of the xbox on top of my bureau I got lucky the second time and the dog kept staring at the closet across the hall; he was in my roommate's high heel.

Start from where he was and slowly comb every inch in one direction then go in the other. If he is a climber go top down, also check your other tubs. Check near/in any electronics in the room.

Good Luck.