Daily Cleaning: 1. Do not use detergents. 2. Discard any tea leaves or other debris, and rinse the inside with clean water. (When brewing tea or coffee, do not leave it dry for too long; it is best to rinse it immediately after filtering and soak it in clean water.) Daily Care for the Filter Cup Clogged Filter Cup: If the filtration rate slows down after a period of use and the micropores become clogged, how can you fix it? 1. Heat the cup over an open flame (such as a gas stove, oven, or torch) until smokeless to restore the initial flow rate. After heating, let it cool and rinse it with clean water. (Note: After heating, the cup be very hot. Do not touch it directly with your hands. Adding water to the filter cup before it cools down may damage it.) 2. If heating is not possible, boil the filter cup in boiling water for about 30 minutes (this not produce a noticeable effect). A New Environmental Concept: Permanently Filter Paper. Filter paper has always been the most common and simple way to brew coffee. However, with the increasing attention paid to environmental issues, using filter paper for brewing coffee is not only environmentally friendly but also expensive. Ceramics are plastic and metal in that they are fired using far-infrared rays during the manufacturing process, so they become better the longer they are used and their quality remains stable. Color: As Shown Material: Ceramics Package Contents: 1 * Tea Strainers Infusers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.