If the bandage becomes wet or dirty, replace it. Otherwise, leave it in place for the first 24 hours. Then once a day:
After removing the bandage, wash the area with soap and water. Use a wet cotton swab to loosen and remove any blood or crust that forms on the wound.
After cleaning, apply a thin layer of antibiotic ointment or cream. Reapply the bandage.
You may shower as usual after the first 24 hours. If the bandage is on an arm or leg, cover it with a plastic bag rubber banded at both ends before showering.
No tub baths or swimming until the bandage is removed and the wound healed (at least 7 days).