There are a few scents that stop spiders, but the most effective one is peppermint oil. Spiders hate the smell of peppermint, so they will stay away from areas where it is present. You can either buy peppermint oil or make your own by mixing equal parts of water and peppermint extract.
Another scent that stops spiders is citrus. Citrus fruits like lemons and oranges contain limonene, which is a natural insecticide. So, if you have spider problems in your home, try spraying some lemon or orange peel around the affected areas.
Finally, eucalyptus oil also repels spiders. Like peppermint oil, eucalyptus has a strong scent that spiders cannot stand. To use it, simply add a few drops to a cotton ball and place it in areas where you've seen spiders.