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When soap dissolves in water, the surface tension of water is reduced
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The hydrophobic part of the soap molecules dissolve and attach to the greasy dirt on the cloth &
the hydrophilic part dissolve in water
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Scrubbing and brushing the cloth will dislodge the greasy dirt from the cloth surface to form greasy droplets
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These greasy droplets surrounded by soap molecules and suspended in soapy water
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Soap bubbles produced by soapy water trap greasy droplets in the soapy water
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When soapy water and bubbles are removed during rinsing, the greasy dirt will be removed
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