Hearing Aid Care: Cleaning, Batteries and Troubleshooting
How to clean and care for hearing aids in Pakistan's heat, dust and humidity, which battery size you need, and how to fix the most common problems yourself.
Hearing aids sit in a warm, waxy, humid environment all day, and in Lahore they also deal with dust and summer heat. The overwhelming majority of devices sent for repair are not broken — they are blocked with wax or affected by moisture. Ten minutes of routine a week prevents most of it.
The daily routine
- Wipe the device with a dry, soft cloth every evening when you take it out. Never use water, alcohol, or cleaning solvents.
- Brush the microphone ports and the receiver opening with the small brush supplied with the device.
- Open the battery door overnight (or place rechargeables in the charger) so moisture can escape.
- Store in the supplied case, away from bathrooms, windows and direct sunlight.
- Put hearing aids in after applying hair oil, perfume, or hairspray — never before.
- Remove them before showering, swimming, or using a hair dryer.
Weekly and monthly tasks
- Check and replace the wax filter — most users need this every four to eight weeks; sooner if you produce a lot of wax.
- Inspect domes for splits or hardening and replace them roughly every three months.
- Check tubing on BTE devices for stiffness, yellowing or cracks; replace every four to six months.
- Use a drying kit or dehumidifier box overnight during the monsoon and in humid summer weather. This is the single most valuable accessory in Pakistan's climate.
Which battery size do I need?
Hearing aid batteries are colour-coded worldwide, so you can match the colour regardless of brand.
| Size | Colour tab | Typical life | Common in |
|---|---|---|---|
| 10 | Yellow | 3–7 days | CIC and IIC (very small) devices |
| 312 | Brown | 3–10 days | RIC and ITC devices — the most common size |
| 13 | Orange | 6–14 days | BTE and ITE devices |
| 675 | Blue | 9–20 days | Powerful BTE and cochlear implant processors |
Troubleshooting: no sound at all
- Check the battery — replace it, or confirm the rechargeable is fully charged.
- Confirm the battery is the right way round and the door closes fully without force.
- Check the wax filter and the receiver opening for blockage; replace the filter.
- Check the dome and tubing for a wax plug.
- Confirm the device is switched on and not in a muted or low-volume programme.
- Try the other ear's device to establish whether the problem is the device or your ear.
Troubleshooting: sound is weak, distorted or crackly
- Weak sound is usually a partially blocked wax filter or a battery near end of life.
- Crackling or intermittent sound usually means moisture — run it in a drying kit overnight.
- Sudden distortion after a hot day often means heat and humidity; dry it before assuming a fault.
- If the sound is fine but speech has become unclear over months, your hearing may have changed — book a retest rather than a repair.
Troubleshooting: whistling and feedback
Whistling means amplified sound is escaping and being picked up again. The usual causes are a dome or earmould that no longer seals well, wax against the eardrum pushing sound back out, or the device not being seated fully. Reinsert it carefully first. If it still whistles, the dome size is probably wrong or you need a wax check — both are quick fixes rather than repairs.
When to send it for repair
If the device is dead after a fresh battery, a new wax filter and an overnight dry, it needs servicing. Visible damage to the case, a receiver wire that has been pulled or crimped, and water immersion all need professional attention. Do not open the casing yourself — it voids the warranty and the components inside are not user-serviceable.