Mix about 1 tsp mask to 1tsp water to a thin smooth consistency.  
Leave on for around 5- 10 mins to dry, starting with only 5 minutes if you have sensitive skin. 
Remove your mask by wiping with a clean cloth or sponge and plenty of water.
Some people may experience the odd blemish as the mask can draw impurities to the skins surface, No need to be alarmed, this is actually a good thing as the mask is doing it's job!