Shaving cartridges having thermal sensors

A method of controlling transfer of heat to skin during a shaving stroke, said method comprising:

• providing a shaving razor system comprising a heating element,
• providing an insulating member for delivering heat to the heating element;
• measuring a temperature of a first area of the heating element with a first thermal sensor;
• measuring a temperature of a second area of the heating element with a second thermal sensor;
• switching power to the insulating member off when an average temperature sensed by the thermal sensors is greater than or equal to a first predetermined temperature;
• and
• switching power to the insulating member off when an individual temperature sensed by either of the thermal sensors is greater than or equal to a second predetermined temperature, wherein the first predetermined temperature is different than the second predetermined temperature.