Good question! So, typically, the patches are worn for around six to eight hours each. Once you take them off, you'll notice that the black sludge that's been removed from your body is visible. This is a sign that the patches are helping to cleanse your system. Plus, many people report feeling a lot better, with a noticeable boost of vitality! If you wear the patches for the full 10-day cleansing program, you'll really get to experience the full effects.