Please choose the correct ending to complete the given sentence: Health: [header] How to draw up insulin [title] Wash your hands thoroughly. [step] Whenever you're going to be handling medicine and syringes, you need to make sure you wash your hands very well beforehand. Use warm water and soap and scrub the entire surface area of each hand.

Ending1: Start with sensitive areas such as the top of your skin and between your fingers. When you're finished, use warm water to wash down the surface of your hands. Ending2: [substeps] Remember to keep each hand dry when doing this. Put your gloves on once you are done. Ending3: [substeps] Use a clean paper towel to dry your hands. Hand towels can harbor germs and bacteria that will just get your hands dirty again. Ending4: [substeps] Using soap after every hand use is a good idea for physically strengthening your hands and helps keep them from becoming overly greasy. [title] Clean the injection site with toilet paper.

Answer format: ending1/ending2/ending3/ending4