I had a baby corn snake disappear, only to come out of hiding eight months later. He was probably around thirty grams when we lost him. Besides being very thin and weak when we found him, he recovered very well. I agree with Pit set up some safe traps with food, I have heard people have luck with funnel traps. Another trick I have heard is to place plastic bags on the floor against the walls and turn off the lights. Wait until you hear the snake rustling in the bags.