I’ve been a “throw everything in and wash on cold” person forever, but I started to notice certain things such as towels that typically require hot or warm water didn’t feel right anymore. Once I switched back they came out feeling soft and fluffy as usual. Why does it matter?
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Separating dirt from clothing requires energy. You either get it from chemicals (detergent), mechanical ( agitating), and/or heat (water temperature).
Ideally you have all 3. There’s not really a scenario where cold water cleans better than warm water, it’s just a marketing thing. If you do the math out on the cost to heat water for laundry…it’s basically trivial (on the scale of a few dollars a year). But “buy our more expensive specialty cold water detergent to save money on water heating!”
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