1pc filter replacement of "The Nel" Cloth Filter.
Before first time use, soak the filter into hot water by 3 minutes. Every time before and after use, rinse the filter with hot water to remove the coffee stain and oil. Use your hand to remove the coffee ground that left in the filter gently, do not rub and twist the filter. After wash, keep it wet and put it in a seal container, then keep it in refrigerator.