When boiling water (for tea) sometimes a white foam forms on the top of the water? What causes this, and is the foam likely to be comprised of anything other than water? -
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How to Create makeshift laundry detergent from a bar of soap and boiling water « Housekeeping :: WonderHowTo
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How to Make Liquid Soap Nuts Laundry Soap Plus Other Plastic-Free Laundry Ideas » My Plastic-free Life
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