A clothes care machine, comprising: a steam generator for generating steam, wherein the steam generator comprises a metal heater for heating a liquid medium to generate steam; a water tank and a duct (7, 20) connected between the water tank and the metal heater; a cathode protecting apparatus having a positive terminal arranged such that in use the positive terminal is electrically connected to the liquid medium, and a negative terminal arranged such that in use the negative terminal is electrically connected to the metal heater, wherein the cathode protecting apparatus comprises: an output power supply having the positive terminal and the negative terminal and configured such that in use the positive terminal and the negative terminal are in constant electrical polarity; an electric conductor, wherein the electric conductor is penetrated through the duct and configured such that in use it contacts with the liquid medium in the duct; a first connecting wire connected between the metal heater and the negative terminal of the output power supply; and a second connecting wire connected between the electric conductor and the positive terminal of the output power supply; and wherein in use the cathode protecting apparatus, the metal heater and the liquid medium are connected to form a current loop so as to compensate for electrons lost in the heater and to prevent the heater from being corroded due to an electron loss. a steam generator for generating steam, wherein the steam generator comprises a metal heater for heating a liquid medium to generate steam; a water tank and a duct (7, 20) connected between the water tank and the metal heater; a cathode protecting apparatus having a positive terminal arranged such that in use the positive terminal is electrically connected to the liquid medium, and a negative terminal arranged such that in use the negative terminal is electrically connected to the metal heater, wherein the cathode protecting apparatus comprises: an output power supply having the positive terminal and the negative terminal and configured such that in use the positive terminal and the negative terminal are in constant electrical polarity; an electric conductor, wherein the electric conductor is penetrated through the duct and configured such that in use it contacts with the liquid medium in the duct; a first connecting wire connected between the metal heater and the negative terminal of the output power supply; and a second connecting wire connected between the electric conductor and the positive terminal of the output power supply; and an output power supply having the positive terminal and the negative terminal and configured such that in use the positive terminal and the negative terminal are in constant electrical polarity; an electric conductor, wherein the electric conductor is penetrated through the duct and configured such that in use it contacts with the liquid medium in the duct; a first connecting wire connected between the metal heater and the negative terminal of the output power supply; and a second connecting wire connected between the electric conductor and the positive terminal of the output power supply; and wherein in use the cathode protecting apparatus, the metal heater and the liquid medium are connected to form a current loop so as to compensate for electrons lost in the heater and to prevent the heater from being corroded due to an electron loss.