Hand-washing need is an important part of personal hygiene and is essential for preventing the spread of germs and illnesses. Hand-washing with SOAP is the most effective way to ensure that hands are clean and free from bacteria. SOAP is a substance used to cleanse and remove dirt, grease, and other impurities from the skin. It is made up of a combination of fats, oils, and alkalis, and is available in both liquid and bar form.