Water-resistant language only helps when the cleaning boundary is clear. This report keeps the routine visible: rinse where the spec allows, use mild soap, dry fully, keep charging points protected, and avoid harsh cleaners or heat.
This report is a method or R&D note. It informs future product selection and product-page language rather than pointing to one material group.
Follow the care instructions supplied with each product. Water-resistant care does not mean dishwasher-safe, heat-safe, cleaner-proof, or suitable for long charging-port exposure.