The evaporating water naturally cools the air around the device
I have a close friend who has a terrible habit of buying made for television products when he sees the commercials. And since you can now buy a lot of these products in select stores, he’s getting them when he goes to a supercenter to purchase groceries. Back in the mid 2000s there was this product called the Cold Heat soldering iron that supposedly only heated up when the tip made contact with metal or solder. It would lose its heat the hour you pulled the tip away as well as couldn’t burn your skin. It was marketed as portable as well as safe, however the execution was horrible. The time it took to heat up the tip made it virtually unUnited Statesble. It was my friend who initially purchased this component as well as he asked me to try it after he struggled to get it to work. In the years since, he hasn’t changed his attitudes even slightly. Recently he purchased a component called a personal air cooler. It’s basically a miniature evaporative cooler, which works in dry weather conditionss through a water vaporization principle. You take a stream of air made by a fan as well as you pass it through a medium that is water soaked forcing the water to evaporate in the process. The evaporating water naturally cools the air around the device. These are great in dry environments where the air is desperate for moisture, however in our humid weather conditions there is too much airborne humidity for the effect to take place. He basically purchased a glorified paper weight unless he plans on moving to the desert any time soon.