Tiny black, brown, gray, or white spots resembling ink splashes on walls, baseboards, or beneath cobwebs are often spider droppings—harmless to human health but signaling active arachnid presence in undisturbed areas—which can be cleaned safely using gloves and mild cleaners while preventing future build-ups through regular vacuuming, clutter removal, sealing cracks, and addressing persistent infestations with professional pest control.
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