Hearing aids require daily maintenance. Routine cleaning is required in order for hearing aids to work at maximum performance. See the Hearing Aids Care and Maintenance section for more detailed information.
Hearing aids will break down! Considering their size, intricacy and typical conditions of use, hearing aids are durable. However, they are not indestructible. They can be damaged by moisture, impact (dropping or crushing), wax build up in the loudspeaker, etc. Like any electronic device, parts eventually wear out and need to be replaced.
Hearing aids have a repair warranty when they are purchased. These warranties are often one or two years. If the hearing aids need to be serviced by the manufacturer after the warranty has expired then repairs have a charge.