# Electric kettle and rice cooker usage and maintenance > Live situation record from CLSTR: https://clstr.news/situations/electric-kettle-and-rice-cooker-usage-and-maintenance > Updated: 2026-10-09T14:17:30.000Z. Sources: 4. Developments: 2. Information regarding household electric appliances focuses on energy efficiency and maintenance. For electric kettles, data suggests that unplugging the device and re-boiling water can save approximately 3,330 yen per year compared to continuous warming, provided the device is not used for at least six hours. However, for periods shorter than two hours, continuous warming may be more efficient. Regarding rice cookers, maintaining rice at optimal quality is best within a three-to-four-hour window to avoid dryness and texture changes. Freezing cooked rice for later reheating is recommended for long-term preservation. Maintenance for electric kettles involves regular descaling to remove white mineral deposits. Experts recommend using mild substances like white vinegar or citric acid instead of abrasive steel wool to avoid scratching interior surfaces. To prevent buildup, manufacturers suggest emptying leftover water after use rather than leaving it to sit. ## Timeline ### 2026-10-09: Electric kettle maintenance and cleaning tips Guidelines for maintaining electric kettles include regular descaling with citric acid or vinegar, avoiding abrasive cleaners, and emptying leftover water to prevent mineral buildup. 2 sources. https://clstr.news/cluster/electric-kettle-maintenance-and-cleaning-tips ### 2026-09-19: Energy efficiency tips for electric kettles and rice cookers Guidelines for saving electricity and maintaining food quality suggest unplugging electric kettles if unused for six hours and freezing cooked rice rather than long-term warming to optimize costs and taste. 2 sources. https://clstr.news/cluster/energy-efficiency-tips-for-electric-kettles-and-rice-cookers --- Cite as: Electric kettle and rice cooker usage and maintenance. CLSTR, https://clstr.news/situations/electric-kettle-and-rice-cooker-usage-and-maintenance