Using these nipple clamps is easy. First, adjust the tension according to your comfort level. You can start with a lighter pressure if you're a beginner and gradually increase it as you get used to the sensation. To put them on, gently place the rubber - tipped ends on your nipples. When you're done, remove them carefully. As for maintenance, after each use, clean the clamps with a mild soap and warm water. Make sure to dry them thoroughly to prevent rusting, especially since they have metal components. Keep them in a cool, dry place when not in use. Always listen to your body when using these clamps. If you feel any discomfort, stop using them immediately. And remember, these are for adult use only in an intimate setting.