Use the wooden spoon that comes with your mask to mix clay with a small amount of water or other liquid in non-metal cup. The reason we use non-metal materials is so the clay will not fill up with the metals as the impurity.
The liquid you choose to mix with your clay can be warm water, yogurt, apple cider vinegar, honey, tea, etc.
Apply to the face, avoiding eyes and mouth, and let dry. Do not inhale.