Using the Rock Exotica Mini Eight is easy. First, select the appropriate rope within the specified size range (6 - 13mm). Pass the rope through the device as needed and use the side ears to adjust the friction according to your climbing needs. Make sure the rubber insert in the biner hole fits tightly on your carabiner before use. When it comes to safety, always check the breaking strength and don't exceed the maximum rope diameter limits. For maintenance, keep it clean and dry after each use. You can use a mild soap and water to clean it, but avoid using harsh chemicals that could damage the 7075 aluminum. Store it in a cool, dry place to ensure its long - term durability.