Free Hearing Aid Maintenance and Repairs for Warranty Period of the Hearing Aid. Hearing aids are built to provide many years of useful service. However, regular exposure to a harsh environment means they will occasionally encounter problems. No matter how fastidious you are when it comes to hygiene, the ear canals inevitably attract dirt, moisture and earwax buildup, all of which can wreak havoc with the electronic components in your hearing aids. Despite your best efforts, sometimes hearing aids will require servicing or repairs. Aditi Hearing can help! If your hearing aids are not working properly, call us to schedule an evaluation.