The clay can totally untie or relieve tension or muscle pain since it acts as a detoxifier and therefore re-mineralizes the muscles, tendons, ... As far as the laying of the clay, it is necessary That the skin is moist and then apply the clay to back-hair for better penetration. You must know that clay acts as long as it is wet! So you can either let it dry in the open air, or under a little damp paper towel, or newspaper if you do not want to soil your cotton and rest. Some use cellophane to lengthen the action time of the clay. The cellophane can be interesting to make a more well-being treatment with a heat effect, for muscular pain, it’s quite useful !!