Soap and washing
Oil and grease don't mix with water, so water alone runs off an oily plate or hand and leaves the grease behind. Soap and washing-up liquid hold on to the grease and let the water carry it away; warm water helps them work faster. A little soap is enough: more is wasted and ends up in rivers.
Depth 1 · Foundation
You know that water alone doesn't wash off oil and grease, that soap and warm water do, and that a little soap is enough.
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- 1
Foundation
You know that water alone doesn't wash off oil and grease, that soap and warm water do, and that a little soap is enough.