i learned this on accident...
i put duct tape in my corn snake cage, and my snake got stuck on its eye and body, then i consulted a vet of course, and he said that this is what he reccomends for catching a loose snake...
instead of foil use duct tape, then when you find the snake caught on the tape, cut off the tape that is not connected to his body, then the next time he sheds, the tape comes off, no damage done
i didnt listen, and soaked my snake in water and pulled the tape off, was scared, but even the eye is okay