Rinse the bamboo tines by dipping them in a bowl of warm water before each use. This helps to soften the bamboo tines, making the chasen flexible and springy for effective whisking action. Shake off excess moisture thoroughly before whisking your matcha. Rinse the bamboo tines thoroughly in warm water after each use to remove any remaining matcha foam. Again, shake off excess moisture and allow to fully dry on a chasen stand. This ensures the handle does not keep excess moisture, potentially leading to mold. The life of a chasen can be extended by storing in a comfortable indoor environment; not too dry and not too humid. A dry environment might cause the chasen to split along the handle, which is expected over time from a standard quality chasen. In our experience, our Everyday Bamboo Matcha Whisk will have effective whisking action for over 200 bowls of matcha.