Which statement about hearing instruments is correct?

Regular maintenance of hearing instruments is crucial for ensuring their optimum performance. Over time, hearing aids can collect dirt, wax, and moisture, which can interfere with their functionality and sound quality. Routine checks and cleanings, along with replacing batteries and updating software when needed, help maintain the devices' efficacy. Additionally, professional servicing or adjustments may be required to adapt to changes in the wearer’s hearing needs. This proactive approach helps maximize the benefits provided by hearing instruments and contributes to a better overall user experience.

Other statements may not universally apply: different types of hearing loss can affect the efficacy of devices, bilaterally fitting may not be necessary or beneficial for everyone, and while some users may benefit from hearing aids over-the-counter, most users typically require a prescription to ensure that their specific hearing needs are adequately met.