The nurse observes a newly employed unlicensed assistive personnel (UAP) checking the temperature of an adult client using a tympanic thermometer. The UAP pulls the client's auricle up and back and prepares to insert the thermometer. Which action should the nurse implement?

Remind the UAP to lubricate the thermometer before gently inserting in the ear.

Use positive reinforcement to affirm that the procedure is being performed correctly.

Demonstrate the correct technique for pulling the client's auricle down and back.

Advise the UAP to hold the thermometer securely in place for a full three minutes.