Charcoal Detox Scrub PediSpa Detox Purifying Scrub infused with black charcoal diminishes calluses and exfoliates dry skin, revealing polished and smooth feet. Stir contents before use. Apply 14 mL / 0.5 fl oz of Scrub to towel dried skin, smooth over foot and lower leg and gently massage into skin. For a softer exfoliation slightly dampen the skin or add water. Rinse in foot bath with soap and water.