Crackling, or static noise in your hearing aids, usually signals that your devices need maintenance—the battery may be low or there could be a buildup of moisture, earwax, or dirt in your hearing aid. When you hear a crackling, first try repositioning your hearing aids. If that doesn’t work, flush your ear canal with an earwax remover and clean your hearing aids thoroughly. If the problem persists, go to a hearing clinic or contact your device manufacturer for assistance.