Bangladesh experiences high relative humidity and warm temperatures for the greater part of the year. For sensitive electronic devices worn directly against human skin—such as hearing aids—atmospheric moisture and perspiration represent the primary causes of unexpected malfunction.
Understanding the Moisture Threat
A digital hearing aid contains miniature microphones, balanced armature receivers, and microprocessors. When sweat or ambient moisture enters the casing, it can oxidize battery contacts, corrode solder joints, and degrade acoustic dampening filters.
5 Essential Daily Care Habits for Humid Climates
1. Nightly Dehumidifier Box Storage
Never leave your hearing aids out on a dressing table or bathroom counter overnight. Always open the battery door (or turn off rechargeable units) and place them inside a sealed drying jar containing active silica gel desiccant capsules or an electronic UV-C sanitizing dry-box.
2. Daily Cerumen (Earwax) Inspection
Earwax naturally softens in hot, humid weather and can migrate into the receiver dome or earmould sound bore. Use the stiff-bristle brush provided in your MHCC maintenance kit to brush down the wax guard each morning before inserting the device.
3. Never Wear Devices in the Shower or Rain
While modern premium hearing aids (such as Phonak Lumity or Rexton Arena) carry IP68 water resistance ratings, this rating is designed for accidental splashes—not prolonged immersion. Always remove your hearing aids before showering, swimming, or walking in heavy monsoon downpours.
4. Allow Batteries to 'Breathe'
If you use disposable Zinc-Air batteries (size 10, 312, 13, or 675), peel off the adhesive sticker and wait a full 60 to 90 seconds before inserting the battery. This allows atmospheric oxygen to fully energize the chemical cell, preventing voltage drops caused by trapped internal humidity.
5. Free Professional Ultrasonic Cleaning at MHCC
All hearing aids purchased through Micro Hearing Care Centre include complimentary lifetime routine vacuum cleaning and acoustic retuning at our Uttara and Gazipur branches. Bring your devices in every 6 months for professional servicing.