After searching online, I realized they were bedbug eggs.
What They Look Like:
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About 1 mm long
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White, oval, shiny
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Often hidden in mattress seams, furniture cracks, or behind baseboards
The Risk:
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Hatch in 6–10 days into blood-feeding larvae
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Bites cause itching, irritation, allergies, and insomnia
How They Spread:
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Suitcases after travel
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Used furniture or clothes
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Even through walls and vents from neighbors
How to Get Rid of Them:
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Deep clean, vacuum seams and cracks
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Wash fabrics at 60°C+
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Use steam on mattresses and furniture
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Best option: call pest control to avoid re-infestation
If I hadn’t spotted those “grains,” within a week I would’ve had a full-blown infestation.