If snakes are living in an area, it is because they are finding food, shelter and water there, says Snake Removal. The easiest way to get rid of snakes is to make the area less attractive to them. Garter snakes like moist, grassy areas near water, says the University of Michigan. They like habitats with hiding places, and they eat earthworms, frogs, slugs, insects and small mice. Garter snakes are harmless to people and eat vermin, so removing them might be counterproductive.