A nurse is teaching a client how to care for his behind-the-ear hearing aids. Which of the following statements by the client indicates an understanding of the teaching?

Proper behind-the-ear hearing aid maintenance is essential for device longevity and function. Disconnecting the battery when removing the hearing aids is correct care; this practice conserves battery life, prevents corrosion from residual current, and allows moisture to escape from the battery compartment, which prolongs the life of both the battery and the device. Using isopropyl alcohol to clean hearing aids is incorrect because alcohol can damage the plastic casing, corrode metal components, and degrade the microphone and speaker membranes; hearing aids should be wiped with a soft, dry cloth or a slightly damp cloth with mild soap. Replacing batteries every 2 weeks is an arbitrary schedule and not based on actual battery life, which varies widely depending on usage hours, device type, and battery brand; batteries should be replaced when the device signals low battery or performance declines. Cleaning the ear canal with cotton swabs before inserting the hearing aids is contraindicated because cotton swabs can push cerumen deeper into the canal, potentially causing impaction and damage to the ear canal or tympanic membrane. Disconnecting the battery upon removal is the statement that clearly reflects understanding of correct hearing aid care.