Wash your bottle with warm water and soap after every use and drying and storing it with the top off. Avoid submerging your bottle and cap in water for long periods of time as this will interfere with the vacuum seal. S'well bottles are NOT dishwasher safe! Running a S’well through the dishwasher can cause paint to chip and the vacuum seal to become ineffective. After washing your S'well, we recommend that you dry your beverage container by airing it out upside down and storing it with the lid off. This will help keep your S’well looking and smelling fresh.