Final answer:
The proper way to use an alcohol-based hand rub is to cover all hand surfaces and rub the product between the hands until they are dry, which should take at least 20 seconds. Do not rinse with water afterwards.
Step-by-step explanation:
The proper way to use an alcohol-based hand rub, according to the Centers for Disease Control and Prevention (CDC), is to rub the product between the hands until they are dry. This usually takes about 20 seconds or longer, which ensures that the alcohol has had enough time to effectively kill any harmful microbes on the hands. Application of an alcohol-based hand rub should involve covering all surfaces of the hands, including the palms, backs of the hands, between fingers, and around and under the fingernails. Soap and water should be used when hands are visibly dirty, but otherwise, alcohol-based hand rubs are an efficient method for hand antisepsis.
To summarize, first, apply a sufficient amount of hand rub to cover your hands completely. Then, rub your hands together, making sure to reach all areas, until the hand rub has completely evaporated and your hands are dry. Avoid rinsing your hands with water or wiping them off before they are dry, as this would reduce the effectiveness of the alcohol.