How can you wash the black spots left by bedbugs? - briefly
Use a pre‑wash soak in hot water (≥ 130 °F) with a strong detergent or an enzyme‑based stain remover, then launder the fabric at a minimum of 60 °C (140 °F). Finish by drying on the highest heat setting to ensure any remaining residue is eliminated.
How can you wash the black spots left by bedbugs? - in detail
The dark marks left by Cimex lectularius are typically fecal stains, blood spots, or exuviae that embed in fibers. Remove loose debris with a soft brush or vacuum before any liquid treatment.
- Test a hidden area for colorfastness. If the material tolerates water and heat, proceed.
- Pre‑soak the affected piece in cold water mixed with an enzymatic cleaner (e.g., protease or amylase) for 15–30 minutes. The enzymes break down protein‑based stains.
- Transfer to a washing machine. Use the hottest temperature the fabric can endure (≥ 60 °C/140 °F) and add a high‑efficacy laundry detergent. For white or bleach‑safe items, include non‑chlorine bleach (oxygen‑based) or a small amount of chlorine bleach (5–6 % solution) to oxidize pigments.
- Run an extra rinse cycle to eliminate residual cleaning agents that might attract insects.
If stains persist after the first wash, repeat the soak‑wash cycle before drying. Machine‑dry on high heat (≥ 70 °C/158 °F) for at least 30 minutes; heat kills any remaining bugs and helps set the stain‑removal process. For items that cannot endure high temperatures, air‑dry in direct sunlight for several hours, as ultraviolet radiation contributes to pigment degradation.
Finally, inspect the cleaned fabric. If any mark remains, apply a spot‑treatment paste of hydrogen peroxide (3 %) and a few drops of liquid dish soap, let it sit 5 minutes, then rinse thoroughly and dry again. This combination oxidizes residual pigments without damaging most textiles.