Please choose the correct ending to complete the given sentence: Health: [header] How to make saline solution to clean a wound [title] Wash your hands! [step] Before you begin cleaning and touching your wound, it is important that your hands are clean to prevent infection. Have a clean, dry paper towel easily accessible to prevent contamination of sterile hands. Wash your hands with soap and lukewarm water for 30 seconds.

Ending1: Check the right contact for the amount of time indicated on the label. [substeps] Disinfect your hands, dry them, and any objects you may have touched with a mild or 100% antibacterial soap. Ending2: [substeps] In order to prevent contaminants from contaminating the environment, always use a sterile hand sanitizer. Do not use saline solutions that contain not 50% saline , 20% hydrogen peroxide, or 1% hydrogen peroxide. Ending3: [title] Soak a piece of breathable material in clean water and apply it to the wound. [step] You should choose non-abrasive materials, such as newsprint or commercial adhesives, because they have fewer risk of infection. Ending4: [substeps] Dirty hands may increase the likelihood of infecting your wound. To wash your hands thoroughly, scrub between your fingers, underneath your fingernails, and up past your wrists.

Answer format: ending1/ending2/ending3/ending4