I just wondered this today. When you a stain on a shirt or on your body, you have to really scrub to get it out. Just rinsing it with water wont remove the stain. So how do machine washer clean clothes so well without using any type of pressure?
I have seen stains come off from clothes, and its really impressive.
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It’s a combination of the fact that you’re trying to scrub the stain off in like 30 seconds, and it takes the machine 30 minutes to do a cycle, with A LOT more water than you’re using. So it’s kinda dissolving the stain in so much water, rather than “scrubbing / scraping” it off. And it’s also because of the detergent, which is really good at chemically making the molecules in the stain (sauce, grease, whatever) NOT stick to the cloth fibers anymore.
Soap in general, that’s what it does. It simply makes dirt or grease stick to itself (the soap), so it unsticks from the cloth fibers and can be carried away by the water.
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