A method of reducing the emissivity of a coated glass article, comprising the following steps in sequence: (a) forming a coated glass article, the coated glass article comprising a glass substrate and a coating formed on the glass substrate, the coating having a first layer deposited over the glass substrate and a second layer, the second layer being provided between the first layer and the glass substrate, wherein the coated glass article exhibits a first emissivity; and (b) heating the coated glass article in an environment set to a predetermined temperature and for a predetermined period of time, wherein, after step (b), the coated glass article exhibits a second emissivity, the second emissivity being less than the first emissivity, wherein after step (a) and before step (b) the coated glass article is cooled to a temperature of less than 35°C, wherein the first layer comprises silicon dioxide (SiO 2) or another suitable oxide of silicon, wherein the second layer comprises a transparent conductive metal oxide, preferably fluorine doped tin oxide (SnO 2:F), wherein step (b) is carried out in an environment set to a predetermined temperature of 550-675°C, preferably 550-650°C, more preferably 575-650°C, most preferably 600-650°C, and wherein the predetermined period of time for heating the coated glass article 10 is 1-10 minutes. (a) forming a coated glass article, the coated glass article comprising a glass substrate and a coating formed on the glass substrate, the coating having a first layer deposited over the glass substrate and a second layer, the second layer being provided between the first layer and the glass substrate, wherein the coated glass article exhibits a first emissivity; and (b) heating the coated glass article in an environment set to a predetermined temperature and for a predetermined period of time, wherein, after step (b), the coated glass article exhibits a second emissivity, the second emissivity being less than the first emissivity, wherein after step (a) and before step (b) the coated glass article is cooled to a temperature of less than 35°C, wherein the first layer comprises silicon dioxide (SiO 2) or another suitable oxide of silicon, wherein the second layer comprises a transparent conductive metal oxide, preferably fluorine doped tin oxide (SnO 2:F), wherein step (b) is carried out in an environment set to a predetermined temperature of 550-675°C, preferably 550-650°C, more preferably 575-650°C, most preferably 600-650°C, and wherein the predetermined period of time for heating the coated glass article 10 is 1-10 minutes. wherein, after step (b), the coated glass article exhibits a second emissivity, the second emissivity being less than the first emissivity, wherein after step (a) and before step (b) the coated glass article is cooled to a temperature of less than 35°C, wherein the first layer comprises silicon dioxide (SiO 2) or another suitable oxide of silicon, wherein the second layer comprises a transparent conductive metal oxide, preferably fluorine doped tin oxide (SnO 2:F), wherein step (b) is carried out in an environment set to a predetermined temperature of 550-675°C, preferably 550-650°C, more preferably 575-650°C, most preferably 600-650°C, and wherein the predetermined period of time for heating the coated glass article 10 is 1-10 minutes.