Like any other item that is used on a daily basis, hearing aids require proper care and maintenance. As they operate in the ear canal, they are constantly exposed to hazardous conditions such as ear wax and moisture which are not ideal for any piece of technology, and this is why they need to be cleaned regularly. The better care you take of your aids, the better they will serve you and the longer their life will be.
The first step to proper hearing aid maintenance is to ensure that you are aware of any cleaning/care tips that are specific to your device. Consult your hearing care professional and carefully read through your manual before attempting to clean the device(s).