Does this work well?
What kind of snakes are we talking about? Garden or poison types? The gardening snakes although a bit scary are really beneficial to the Eco system by removing unwanted mice and some larger insects. The others not so much. If they are the poisonous types you need to seek out the help from a pro. Quite often then not it is the habitat that attracts snakes. They need to regulate their body temps and seek out areas where they can hide from the hot sun when to hot and easily come out and rest in the sun when to cold. A pro will be able to help you spot those special places that they like and suggest methods on how to keep them away.