– Ingredients: 1 small onion 1 garlic head 4 cups water 4 tablespoons cayenne pepper 1 tablespoon liquid dish soap – Instructions: Chop the onion and garlic. Combine the chopped onion and garlic with water in a container. Add cayenne pepper and liquid dish soap. Mix well and transfer the solution to a spray bottle. Spray it around your outdoor areas to repel mosquitos.