Hello! If you have just received the 80K 3-in-1 RF Cavitation Machine (TS00105) and are using it for the first time, here is what you need to know: Does the fat burning head generate heat? Cavitation (80K) Probe: The ultrasonic cavitation head does not generate noticeable heat because it uses high-frequency sound waves (80kHz) to break up fat cells. It may cause a slight vibration or a slight sensation, but it will not feel warm. RF (Radio Frequency) Probe: The RF head generates heat as it penetrates the skin to stimulate collagen and tighten the skin. However, it may take several minutes for the heating effect to become noticeable, depending on your skin type and the settings used. Why does the gel feel cold? The gel is naturally cool when first applied to the skin. This is common with conductive gels used in beauty devices. To reduce discomfort, you can: Warm the gel slightly before application (do not overheat). Use a smaller amount of gel to minimize the cooling effect. Keep the device in continuous motion over the skin to prevent overcooling of an area. How to ensure proper operation Check the settings - make sure you have selected the correct mode and intensity level. Ensure proper contact - the probe should be pressed firmly against the skin. Try different areas - some parts of the body may feel warmth quicker than others. If your RF probe is not generating heat at all, even after several minutes of use, try increasing the intensity. If the problem persists, contact Freyara Customer Support for further assistance.