How to treat a sofa after bedbugs? - briefly
Remove cushions, launder them in water above 60 °C, vacuum the upholstery and frame thoroughly, then apply a labeled residual insecticide and cover the sofa with an encasement to prevent re‑infestation.
How to treat a sofa after bedbugs? - in detail
Treating a sofa that has been infested with bedbugs requires a systematic approach to eliminate all life stages of the insects and prevent re‑infestation.
First, isolate the piece of furniture. Move it away from walls, other upholstered items, and the floor. Cover the sofa with a heavy‑duty plastic sheet or a zippered encasement designed for pest control. Seal all seams and openings to contain insects and eggs.
Next, apply a residual insecticide. Choose a product labeled for use on fabrics and upholstered furniture, containing a pyrethroid or neonicotinoid active ingredient. Follow the manufacturer’s dosage instructions, spraying evenly over the entire surface, paying special attention to seams, cushions, and crevices. Allow the chemical to dry completely before proceeding.
Heat treatment is the most effective non‑chemical method. Use a portable steam cleaner that produces vapor at 120–130 °C (248–266 °F). Slowly steam every part of the sofa, including the frame, legs, and underside of cushions. The high temperature kills adult bugs, nymphs, and eggs on contact. After steaming, let the sofa dry thoroughly to avoid mold growth.
If heat equipment is unavailable, employ a freezing protocol. Place the sofa or its removable components in a freezer set to –18 °C (0 °F) for at least 72 hours. This temperature duration guarantees mortality of all stages. Ensure the sofa is protected from moisture condensation during thawing.
After chemical and thermal interventions, conduct a thorough vacuuming. Use a HEPA‑filter vacuum with a brush attachment to remove dead insects, shed skins, and egg shells. Empty the vacuum canister into a sealed bag and discard it outside the home.
Finally, monitor the sofa for several weeks. Place sticky traps around the legs and under the cushions. Replace the protective encasement after 30 days, then wash all removable covers in hot water (≥60 °C) and dry on high heat. Maintaining low humidity and regular cleaning will reduce the risk of a new outbreak.