First make sure he's actually missing not just hiding in the cage somewhere. They tend to do that. I would leave the lid to the cage open and the heating on, he may decide to come back on his own if the rest of your house is too cold. You can also do the sodd pop bottle thing... take an empty 2 liter coke bottle and put a f/t pinky in there and put a heat light on it (the light is not really necessary)... he may get hungry and come back.
But in your searching, look up first. Corns LOVE to climb, and will go up before they go down. Look in every box that there's no way he could get in. Then look under and all around it. Remember how extremly small it can coil up into. Then realize it can get a lot smaller than that.
I'm sure you'll find it... just look in all your closets and any dark space.
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-Chris
The reason mainstream thought is thought of as a stream is because it's so shallow. -George Carlin
A fool doesn't learn. A smart man learns from his mistakes. A wise man learns from the mistakes of others. Which one are you?
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Current snakes:
0.1 Licorice Stick Black Rat (Lola)
1.0 Black Rat (Frankie)
0.1 Texas Bairdi (Rosa)
0.1 Blue Beauty (Brunhilde)
1.0 Green Tree Python (Monty)