When it comes to getting stains out of clothing, upholstery, and other fabrics, you might assume that water is water, and its temperature really doesn't matter. But similar to cleaning wood floors and ...
Exposing a sweat-like stain on cotton (left image) to a blue LED light for 10 minutes significantly removed the yellow color (right image). Sweat and food stains can ruin your favorite clothes. But ...
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