Abstract: An apparatus for restoring the efficiency of ice cube making machines with a vertically oriented evaporator plate is disclosed. These evaporator plates have a series of ice cube molds arranged in a lattice pattern on one side of the evaporator plate and a refrigerant coil attached to the other. The ice cube molds are of a generally square or rectangular cross section with the lower face being either horizontal or tapered downwardly to facilitate ice harvesting. The apparatus is a piece of low friction plastic material shaped to fit the lower face of the ice cube mold. This forms a low friction surface or skate which allows the ice harvesting to be restored to its original efficiency.