[header] How to cut mushrooms [title] Wipe the mushrooms with a damp paper towel. [step] Wet a folded paper towel with cool water and wring out the excess moisture. Go over the outside of the caps using light sweeping strokes to clear away any dirt or sediment that's clinging to the outside. 
When the mushrooms are clean, transfer them to a bowl or colander and place them near your prep area. [substeps] Don't rinse or soak mushrooms.