Never heard of the cooking oil approach, but it sounds interesting. We use frontline. We treat the cage, and the snake, withhold the water bowl for a day or so, and then watch the animal. You have to get the Frontline from a vet and it is pricey, but it is effective. Read the directions and wear gloves. It reeks, so use it in a ventilated area. Our vet approves it.

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