How to Use Baking Soda Against Pests 聯 Cockroaches 荒 Mix baking soda and sugar in equal parts. Sprinkle behind appliances and along baseboards. Fleas 裂 Baking soda salt. Sprinkle over carpets and pet bedding, let sit, then vacuum thoroughly. Ants Baking soda powdered sugar. Sprinkle near ant trails. Moths 曆 Place an open box of baking soda inside closets or wardrobes. Mice and rats Baking soda flour. Place near holes or droppings. Spiders Mix baking soda with water and spray into corners and cracks. Snails, slugs, and centipedes Sprinkle directly to dehydrate and eliminate them. Extra tip Safe for children and pets. An eco-friendly alternative to harsh chemical products. A simple and powerful ally for a clean, pest-free home.