Saving fruit peels to turn them into natural cleaning products

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Every time I peel fruits or remove their skins, I feel a little guilty about having to throw them away when some of my colleagues save them to make cleaning products. Have you heard about fermenting fruit skins in water with brown sugar and turning them into natural cleaning products?

Apparently, they are effective for cleaning jobs and they are not abrasive to the hands. Needless to say they are eco-friendly. Maybe I should start looking into this green cleaning method to contribute a little to saving our planet.