What smell do earwigs hate the most? Earwigs hate strong scents that act as natural repellents, most hated being peppermint, eucalyptus, tea tree, lavender, cedar, citrus, cinnamon, and clove. Peppermint oil with strong menthol scent is most hated and effective, used as spray diluted with water around entry points, baseboards, windows, doors, and damp areas where earwigs seen, as strong menthol disrupts their sensory organs and deters. Eucalyptus and tea tree oil also strongly repel with medicinal scent. Lavender scent with dried sachets or oil deters with floral strong scent. Cedar oil and cedar blocks contain natural insect repellent compounds hated by many insects including earwigs. Citrus peels and lemon, orange, lime oils with strong citrus smell repel. Cinnamon and clove strong spices deter. To use, place cotton balls soaked in essential oils in cracks, entry points, basements, bathrooms, or spray diluted oils regularly, as scent fades quickly and needs reapplication.
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