Spiders hunt other insects, so they keep the overall creepy crawlie population down.
One or two of them will do. What to do After sucking up all visible spider webs with your vacuum cleaner, you'll be happy to know one simple addition to your ant control spray will tackle spiders as well. Add 3 or 4 drops of your essential oils to a bottle of the recipe for ant spray. Shake vigorously, let sit until the bubbles subside and you'll be ready to spray anywhere you spot spiders. This recipe also kills ants, if you want to mix up a batch for both types of pests.