Indoor traps commonly target flying pests such as house flies, fruit flies, gnats (including fungus gnats), non‑biting midges, moths, and mosquitoes.
Plug‑in light traps use UV and blue light to lure flying insects, then capture them on a sticky, easy‑to‑change adhesive cartridge or backing that you dispose of when full.
Replacement varies by product and use: some liquid fruit‑fly traps list about a 30‑day life, light‑trap adhesive cartridges are typically replaced monthly or when visibly full, and user reviews note some units may need refilling about every two weeks in heavy use. Follow the manufacturer’s guidance and replace cartridges or liquid lures when the trap is full or performance declines.
Place traps where insects are commonly seen or near food and trash sources—common locations include kitchens (near fruit bowls and garbage), houseplants, entryways, garages, bathrooms, and other areas with heavy flying‑insect activity.
Many traps are plug‑and‑play with no assembly required and use simple cartridge swaps; a few require adult assembly. Upkeep generally means checking and replacing adhesive cartridges or replacing liquid traps when full—manufacturers often advise monthly replacement or replacement when the cartridge is visibly full.