Why is my house suddenly full of earwigs? Your house is suddenly full of earwigs likely due to environmental conditions outdoors and indoors that drive them inside. Heavy rain or overwatered gardens and mulch near foundation create damp habitat that boosts population outdoors, and when conditions become too wet or dry, they migrate indoors seeking shelter through cracks, gaps in doors, windows, foundations, and around pipes. Seasonal change in late summer and fall may cause them to seek shelter for overwintering. High humidity indoors from leaks, poor ventilation, damp basements, bathrooms, and crawl spaces attracts them, as they need moisture to survive. Mulch, leaf litter, wood piles, and decaying organic matter close to house provide breeding habitat near entry points. Lights at night may attract them indoors. So sudden full house indicates outdoor population boom plus entry points and indoor moisture, not indoor breeding, as earwigs do not typically breed indoors, so address moisture, remove organic debris near foundation, seal cracks, and use dehumidifier and traps.
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