Altai Balance To start with, sweat is one of the significant problems of Apparent Hearing failure. The perspiration from your ear slips to the circuitry of this aid and shorts it out. There are preventative steps that you can do to avoid this. But first of all, let's look at what the "company" can do for you. Most traders will suggest an anti-moisture coating to your hearing instrument. This "coating" is allegedly designed to keep moisture out. In fact, it does not exist. When working in quality control, I asked my partner if he can inform me how to tell if the crystal clear hearing had this coat on, he took the aid from me, snapped his palms and waved his hands. "There," he stated, "it's about there. " The cost at the opportunity to the dealer was $29.95 and that knew what they billed grandma and grandpa. I was shocked.