Make it Tough for Them to Get in
Spiders love dark, tight spaces. The first thing to do to keep a spider from coming into your home is to block all the possible hiding places for it. Attics and basements are excellent spider homes and it can be nearly impossible to keep spiders from coming into those less-used spaces. Fill any cracks along baseboards, ceilings, or windows. Make sure there aren’t any gaps around your doors. Don’t leave newspaper or cardboard boxes lying around, especially in dark places like under the bed. Vacuum often to pick up any small unseen spiders and destroy any eggs that may have bee laid in cracks or crevices.
There are several kinds of essential oils that spiders dislike. Peppermint and tea tree oil are two of the most effective scents. You can keep spiders away simply by lighting scented candles or using scented wax burners. A more direct way to use essential oils is to create a spray and using it along baseboards, windows, and doorways. Spiders dislike lavender oil as well. Fill a flower vase with water, add five or six drops of lavender to the water, then add your fresh flowers. The lavender scent will keep spiders away from that part of the room.
Citrus and Vinegar
The acidic nature of any citrus fruit will get rid of spiders. All lemon scented liquids will effectively keep spiders out of a room, so stick with lemon scents for floor cleaners, hand wash, and any other cleaning supplies you use. You can create your own citrus spray by using lemon or orange peels. Boil the peels in water, then spray the lemon or orange water throughout your home. Dried peels can be ground into a powder and sprinkled along baseboards or under cabinets where spiders like to lurk.
Not all natural spider repellents are as pleasant to use as essential oils and citrus cleaners, but if you have an infestation these may be your best bet to kill the spiders as well as keep them away. Diatomaceous earth is a type of soil that has larger, sharper particles than typical garden soil. When spiders walk through a patch of diatomaceous earth, the particles scratch off the spider’s protective outer coating, causing the arachnid to eventually die from dehydration. Sprinkle the diatomaceous earth anywhere you’ve seen spiders in your home and then wait. After a couple of days, vacuum the earth away. You’ll probably vacuum up some dehydrated spiders, too.