Clean an electric toothbrush head, handle and charger safely
Rinse the head after brushing, clean handle junctions as permitted, and keep the unplugged charging base dry.
An electric toothbrush's head, water-resistant handle and powered charger need different treatment. Oral-B iO guidance recommends rinsing the head and junction, drying the parts and storing upright, while cleaning the charger with a damp cloth only when unplugged. These instructions are model-specific: other brands may differ.