Why shouldn't you kill earwigs? You shouldn't necessarily kill earwigs because they are beneficial insects outdoors, serving as predators that eat other pest insects like aphids, mites, and decaying organic matter, helping control garden pests and decomposing organic material, improving soil health. Outdoors, they are part of ecosystem and contribute to natural pest control, so killing them in garden may increase other pests. Indoors, while they are nuisance, they do not cause significant damage, do not bite dangerously, do not transmit diseases, and do not infest homes like cockroaches, so catching and releasing outside is more humane and environmentally friendly than using insecticides, especially if only few seen. However, if you have large numbers indoors, you may need to kill or remove to prevent nuisance, but you should address underlying moisture and entry points rather than just killing, as killing alone does not prevent more. So you shouldn't kill earwigs outdoors due to beneficial role, and indoors prefer removal over killing unless infestation.
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