What is the best way to clean and maintain a kitchen sink stopper rubber to ensure it functions properly and lasts longer?

To clean and maintain a kitchen sink stopper rubber, regularly wash it with warm soapy water, scrubbing gently to remove debris. Avoid using harsh chemicals or abrasive cleaners. Dry the stopper thoroughly after cleaning to prevent mold growth. Additionally, periodically apply a small amount of silicone lubricant to keep the rubber supple and prevent it from drying out, which can help prolong its lifespan and ensure proper functioning.