Water does not easily remove grease from dirty hands because grease is nonpolar and water is polar; therefore they are immiscible. The addition of soap, however, results in the removal of the grease. Examine the structure of soap shown here and explain how soap works.
Here, we are going to explain how does shop work to remove grease.
Soap consists of two different ends. One end of the soap molecule is hydrophobic and one end consists of hydrophilic group.
Grease, oil and water don't mix with each other. They are immiscible to each other. When soap is added to the grease, it break ups the grease into smaller drops, which can mix with the water.