Using the Addi HeartStopper is super easy. First, find the end of your addi Click cable. Then, simply click the HeartStopper end - caps onto it. To make flexible straight needles, attach the end - caps at both ends of the cable. For Tunisian crochet hooks, adjust the end - caps according to the length you need. When you're done with a project and want to use the Click tips elsewhere, just remove the HeartStopper. As for maintenance, keep it clean by wiping it with a dry cloth. Avoid using harsh chemicals as they might damage the accessory. Also, store it in a dry place to prevent any rust or wear. With these simple steps, you can enjoy using your Addi HeartStopper for a long time.