Melted Paraffin Offers Great Benefits For The Hands And Feet By Softening And Smoothing The Skin As Well As Relieving Sore Muscles And Joints. To Begin Your Paraffin Spa Treatment, Remove All Packaging From The Wax And Place It In The Tub. When The Tub Is Plugged In And Turned On, An Indicator Light Will Tell You That The Unit Is Heating. Note: The 6-Pound Block Of Wax Can Take Up To Six Hours To Melt, So You May Need To Plan Ahead!