Getting rid of snakes. Go to your pharmacy store and buy Sulfur powder. Sprinkle this powder at all door entrances (like a line). And you need to re-apply after some time or after a rain. Sulfur keeps snakes away. sulfur is proven well.
Irish Spring and a cheese grater. Apparently squirrels hate the smell of the soap, so they'll stay out of your garden. as well as deer and mice. Rather than grate it, I cut chunks of Irish Spring soap.