Article: Permethrin is a synthetic chemical that is used as an insecticide, insect repellent, or acaricide. Permethrin sprays are typically designed to kill scabies and lice, but 2 to 3 sprays is enough to kill maggots. Liquid (shampoo) and cream products also contain permethrin. Mix 4 parts boiling water with 1 part permethrin dog shampoo and slowly dump the mixture over any maggots.  Apply your spray or permethrin mixture in a 5 to 25 foot (1.5 to 7.6 m) radius from the source of the maggots. This will ensure that you reach the entire affected area and prevent the maggots from returning. While permethrin is safe for use in human hair and on the scalp, take care not to get it in your eyes, ears, nose, or mouth. If you do, flush or clean it away immediately. Permethrin and synthetic pyrethroids can be fatal to cats and fish—keep them away from pets! Mix 1 cup (0.24 L) of bleach with 1 cup (0.24 L) of water in a plastic or metal bowl. If you're dumping the mixture onto the ground, gently pour it over the region with maggots, taking care to hit all of them. If you're dumping bleach into a trash can, close the lid after pouring it and let the fumes suffocate the maggots. Let the bleach sit for about 30 minutes before you open the can and clean it out. After clearing out the affected area, pour another bowl of bleach over it to prevent the maggots from returning. Although they aren't as effective as permethrin, pest sprays will eventually kill maggots. Give 2 to 3 sprays to the affected areas, holding down the trigger for about 2 seconds at a time. It might take 30 minutes or more for it to start taking effect. In general, bug sprays that act as fumigators, wasp, and hornet killers, as well as ant and roach killers, will work. Bug killer sprays can be purchased from grocery stores and big-box stores. Select products that contain permethrin if possible. Hairsprays can be effective if you apply 5 or 6 sprays lasting about 2 seconds each. You can also mix 1 part multi-surface or all-purpose cleaner with 4 parts boiling water. Afterward, gently pour it over the maggots. Try using hairsprays, multi-surface cleaners, and all-purpose cleaners. Chemicals such as motor oil or brake or carburetor cleaner are effective choices. Mix 1 cup (0.24 L) of carburetor cleaner with 1 to 2 gallons (3.8 to 7.6 L) of hot water. Slowly dump the mixture into your trash can after having disposed of the trash. Close the lid and allow the toxic fumes and hot water to work its magic for about 1 hour. Afterward, throw the dead maggots into a dumpster or outdoor garbage.  Carburetor cleaner is extremely toxic—only use it as a last resort. Always wear proper clothing and gloves. Do not mix carburetor cleaner with any other solvents. Chlorinated carburetor cleaner can interact with other solvents to form a toxic mix of gases that can be harmful if inhaled or exposed to skin.
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Apply a water-based permethrin spray to medium-sized hordes. Mix bleach and water into a bowl and pour it over large maggot hordes. Spray stray maggots with standard bug killer. Apply household chemical solutions as alternative insecticides. Mix water with household chemical and apply to large trash can hordes.