A nurse is providing discharge teaching to a client who has a new prescription for home oxygen therapy via a nasal cannula. Which of the following should the nurse include in the teaching?

Check the tops of the ears for skin breakdown.

Verify the oxygen flow rate every other day.

Post no smoking signs in a prominent location in the home.

Check the cannula position on a regular basis.

Apply petroleum ointment to nares if they become dry and irritated.