If used carefully and stored properly, the Xiaomi Nose Hair Trimmer will have a long lifespan. To clean the Xiaomi Nose Hair Trimmer, please refer to the following steps: 1. Before cleaning the trimmer, make sure it is turned off and not being charged; 2. Rotate the trimming head assembly counterclockwise until “○” on it aligns with “•” on the main body; 3. Detach the trimming head, rinse it with clean water, and use a brush to clean the inner trimming head. After rinsing, wipe with a clean cloth and let it air dry before securing the cover; 4. After the trimming head assembly is air-dry, align “○” on it with “•” on the main body, and push it into the main body. Rotate it clockwise until “●” on it aligns with “•” on the main body and you hear a click, indicating it is installed in place. Note: 1. For optimal trimming effect, clean the trimming head assembly in time after each use to prevent it from being blocked by nose hair residue; 2. Store the trimmer in a dry and well-ventilated place after cleaning.