... necessary for ion cleanse detox foot spa, without it, the machine can not work.. And the function of ion cleanse detox foot spa is as below ... comfortably seated with feet placed in a container with warm water; 3. By infiltration of ion, it can strengthen cell activity, ... toxin, increasing immune system;6. Stimulate the brain cell, do away with the pressure, alleviate tired, increase sleep quantity;7. ...