Melt the Gel Wax. Preheat oven to 225 degrees Fahrenheit. While the oven is warming, cut or chunk off the desired amount of Gel Wax. When the oven is heated place the Gel Wax into the glass container and carefully set it in the oven. Let the Gel Wax melt in your oven for approximately one hour. Please do note that Gel Wax melts at a slower rate than traditional waxes on the market. Be patient, and do not rush the process or turn up the heat source.