To prevent spiders from entering your home, turn off outdoor lights. Although light cannot kill spiders, it can reduce their numbers. Most spiders enter homes to find food. Unfortunately, they also love other bugs. They attract light, so ensure your outside lights are always on.
Citrus peel is an excellent choice for spiders because it can be used to cover bookcases and windowsills. Citronella candles can also be used outdoors and indoors to polish furniture or cleaners with lemon scents.
The citrus peel can be applied to skirting boards or windowsills. Spiders dislike citrus odours. Spiders do not like citrus odours.