Amazon offers its Prime members the Zwipes Microfiber Cleaning Cloth 48-Pack for $24.25. Add it to your cart via Subscribe & Save and they fall to $20.61. With free shipping (Non-members can spend $25 to qualify for free shipping; otherwise it adds $9.71), that's $0.43 per cloth and the lowest per-unit price we've seen. (It's also a current low by $9.) These 12x16" cloths purportedly absorb eight times their own weight.

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