Using these Calexotics Crossbar Adjustable Nipple Vices is easy. First, decide if you want to use one or both clamps. Then, place the clamps on your nipples. To adjust the pressure, simply twist the twin screws. If you want a tighter sensation, turn the screws so the crossbars get closer together. For a looser feel, turn them the other way to move the crossbars apart. When using these vices, make sure not to over - tighten as it could cause discomfort. Always listen to your body. After use, it's important to clean the clamps. You can wash them with warm soapy water or use our CalExotics toy cleaner. Then, let them dry completely before storing. This will keep them in good condition and ensure they're safe for future use.