Using these nipple clamps is easy. First, adjust the thumb - screws to get the right tightness that suits your comfort level. You can play around with different levels of pressure for a variety of sensations. The removable rubber tips can be taken off or left on depending on how intense you want the experience to be. When you're done using them, clean the clamps with a mild soap and warm water. Make sure to dry them thoroughly to prevent rusting. Keep them in a cool, dry place, away from direct sunlight. Always listen to your body when using these clamps. If it starts to hurt too much, loosen them right away. And remember, these are for adult use only.