A nurse is teaching a client who has a prescription for home oxygen therapy. Which of the following instructions should the nurse include?

Oxygen is a highly flammable accelerant that significantly increases the risk of fire ignition. Clients using home oxygen must avoid all electrical equipment that could produce sparks near the oxygen source, including electric razors, hair dryers, and certain medical devices if used improperly in the vicinity of the oxygen delivery system. This is the most critical safety instruction to include in home oxygen teaching. Adjusting the oxygen flow rate based on shortness of breath is unsafe because altering prescribed flow rates without provider guidance can lead to oxygen toxicity or, particularly in clients with chronic obstructive pulmonary disease, may suppress the hypoxic drive, resulting in hypoventilation or respiratory arrest. Using petroleum-based ointments such as Vaseline to moisturize lips is contraindicated because petroleum products are flammable and can ignite in the presence of oxygen, posing a serious burn risk to the client's face and airway. Water-based lubricants should be used instead. Wool blankets generate static electricity, which can create sparks in an oxygen-enriched environment and increase the risk of fire. Clients should use cotton blankets and clothing instead. Overall, fire safety is the overarching principle in home oxygen therapy education, and avoiding electrical equipment near oxygen delivery systems is a foundational safety instruction.