Our Oui Fresh oils are great for this spray since they are therapeutic grade oils and are 100% pure with no fillers (they have also been tested for quality and safety). There are several oils that spiders are really not into: lemon (any citrus oil is good), peppermint, tea tree, and lavender.
Fill spray bottle of choice with water and add the peppermint essential oil. Give it a good shake and wahlah! You have the easiest, most effective natural spider .
Ants really dislike peppermint oil, we had some trying to get into the house, they abruptly stopped when spritzed and didn't return. FYI Spiders do too! Love that .